Finding the Fourth Proportional to 31,009.02, 42,792.39 and 16,861.74

Step by Step Solution

1. Step 1: Write the proportion equation
   31,009.02 : 42,792.39 = 16,861.74 : x
2. Step 2: Convert to fraction form
   31,009.02/42,792.39 = 16,861.74/x
3. Step 3: Cross multiply
   31,009.02x = 42,792.39 × 16,861.74
4. Step 4: Simplify right side
   31,009.02x = 721,554,154.16
5. Step 5: Solve for x
   x = 721,554,154.16/31,009.02
6. Step 6: Final answer
   x = 23,269.17