Finding the Fourth Proportional to 10,915.17, 16,372.71 and 3,124.59

Step by Step Solution

1. Step 1: Write the proportion equation
   10,915.17 : 16,372.71 = 3,124.59 : x
2. Step 2: Convert to fraction form
   10,915.17/16,372.71 = 3,124.59/x
3. Step 3: Cross multiply
   10,915.17x = 16,372.71 × 3,124.59
4. Step 4: Simplify right side
   10,915.17x = 51,158,005.94
5. Step 5: Solve for x
   x = 51,158,005.94/10,915.17
6. Step 6: Final answer
   x = 4,686.87