Finding the Fourth Proportional to 21,109,538.31, 31,684,783.17 and 10,187,414.29

Step by Step Solution

1. Step 1: Write the proportion equation
   21,109,538.31 : 31,684,783.17 = 10,187,414.29 : x
2. Step 2: Convert to fraction form
   21,109,538.31/31,684,783.17 = 10,187,414.29/x
3. Step 3: Cross multiply
   21,109,538.31x = 31,684,783.17 × 10,187,414.29
4. Step 4: Simplify right side
   21,109,538.31x = 322,786,012,790,672.38
5. Step 5: Solve for x
   x = 322,786,012,790,672.38/21,109,538.31
6. Step 6: Final answer
   x = 15,291,002.96