Finding the Fourth Proportional to 31,039.61, 42,833.81 and 16,892.15

Step by Step Solution

1. Step 1: Write the proportion equation
   31,039.61 : 42,833.81 = 16,892.15 : x
2. Step 2: Convert to fraction form
   31,039.61/42,833.81 = 16,892.15/x
3. Step 3: Cross multiply
   31,039.61x = 42,833.81 × 16,892.15
4. Step 4: Simplify right side
   31,039.61x = 723,554,971.65
5. Step 5: Solve for x
   x = 723,554,971.65/31,039.61
6. Step 6: Final answer
   x = 23,310.70