Finding the Fourth Proportional to 21,438,362.72, 29,581,610.18 and 12,736,311.68

Step by Step Solution

1. Step 1: Write the proportion equation
   21,438,362.72 : 29,581,610.18 = 12,736,311.68 : x
2. Step 2: Convert to fraction form
   21,438,362.72/29,581,610.18 = 12,736,311.68/x
3. Step 3: Cross multiply
   21,438,362.72x = 29,581,610.18 × 12,736,311.68
4. Step 4: Simplify right side
   21,438,362.72x = 376,760,607,248,740.88
5. Step 5: Solve for x
   x = 376,760,607,248,740.88/21,438,362.72
6. Step 6: Final answer
   x = 17,574,131.58