Finding the Fourth Proportional to 31,062.29, 42,866.45 and 16,915.12

Step by Step Solution

1. Step 1: Write the proportion equation
   31,062.29 : 42,866.45 = 16,915.12 : x
2. Step 2: Convert to fraction form
   31,062.29/42,866.45 = 16,915.12/x
3. Step 3: Cross multiply
   31,062.29x = 42,866.45 × 16,915.12
4. Step 4: Simplify right side
   31,062.29x = 725,091,061.15
5. Step 5: Solve for x
   x = 725,091,061.15/31,062.29
6. Step 6: Final answer
   x = 23,343.13