Finding the Fourth Proportional to 31,061.15, 42,863.10 and 16,913.96

Step by Step Solution

1. Step 1: Write the proportion equation
   31,061.15 : 42,863.10 = 16,913.96 : x
2. Step 2: Convert to fraction form
   31,061.15/42,863.10 = 16,913.96/x
3. Step 3: Cross multiply
   31,061.15x = 42,863.10 × 16,913.96
4. Step 4: Simplify right side
   31,061.15x = 724,984,758.88
5. Step 5: Solve for x
   x = 724,984,758.88/31,061.15
6. Step 6: Final answer
   x = 23,340.56