Finding the Fourth Proportional to 19,664,208,188.01, 27,139,092,689.60 and 12,895,721,139.31

Step by Step Solution

1. Step 1: Write the proportion equation
   19,664,208,188.01 : 27,139,092,689.60 = 12,895,721,139.31 : x
2. Step 2: Convert to fraction form
   19,664,208,188.01/27,139,092,689.60 = 12,895,721,139.31/x
3. Step 3: Cross multiply
   19,664,208,188.01x = 27,139,092,689.60 × 12,895,721,139.31
4. Step 4: Simplify right side
   19,664,208,188.01x = 349,978,171,298,968,174,592
5. Step 5: Solve for x
   x = 349,978,171,298,968,174,592/19,664,208,188.01
6. Step 6: Final answer
   x = 17,797,725,082.69