Finding the Fourth Proportional to 31,008.98, 42,792.93 and 16,861.91

Step by Step Solution

1. Step 1: Write the proportion equation
   31,008.98 : 42,792.93 = 16,861.91 : x
2. Step 2: Convert to fraction form
   31,008.98/42,792.93 = 16,861.91/x
3. Step 3: Cross multiply
   31,008.98x = 42,792.93 × 16,861.91
4. Step 4: Simplify right side
   31,008.98x = 721,570,534.30
5. Step 5: Solve for x
   x = 721,570,534.30/31,008.98
6. Step 6: Final answer
   x = 23,269.73