Finding the Fourth Proportional to 12,915.74, 17,824.31 and 10,116.38

Step by Step Solution

1. Step 1: Write the proportion equation
   12,915.74 : 17,824.31 = 10,116.38 : x
2. Step 2: Convert to fraction form
   12,915.74/17,824.31 = 10,116.38/x
3. Step 3: Cross multiply
   12,915.74x = 17,824.31 × 10,116.38
4. Step 4: Simplify right side
   12,915.74x = 180,317,353.49
5. Step 5: Solve for x
   x = 180,317,353.49/12,915.74
6. Step 6: Final answer
   x = 13,961.06