Finding the Fourth Proportional to 21,650,240.31, 29,877,329.15 and 12,948,411.53

Step by Step Solution

1. Step 1: Write the proportion equation
   21,650,240.31 : 29,877,329.15 = 12,948,411.53 : x
2. Step 2: Convert to fraction form
   21,650,240.31/29,877,329.15 = 12,948,411.53/x
3. Step 3: Cross multiply
   21,650,240.31x = 29,877,329.15 × 12,948,411.53
4. Step 4: Simplify right side
   21,650,240.31x = 386,863,953,037,336.38
5. Step 5: Solve for x
   x = 386,863,953,037,336.38/21,650,240.31
6. Step 6: Final answer
   x = 17,868,806.42