Finding the Fourth Proportional to 139,968,131.52, 209,952,197.28 and 139,968,131.52

Step by Step Solution

1. Step 1: Write the proportion equation
   139,968,131.52 : 209,952,197.28 = 139,968,131.52 : x
2. Step 2: Convert to fraction form
   139,968,131.52/209,952,197.28 = 139,968,131.52/x
3. Step 3: Cross multiply
   139,968,131.52x = 209,952,197.28 × 139,968,131.52
4. Step 4: Simplify right side
   139,968,131.52x = 29,386,616,761,800,028
5. Step 5: Solve for x
   x = 29,386,616,761,800,028/139,968,131.52
6. Step 6: Final answer
   x = 209,952,197.28