Finding the Fourth Proportional to 31,092.76, 42,908.64 and 16,945.61

Step by Step Solution

1. Step 1: Write the proportion equation
   31,092.76 : 42,908.64 = 16,945.61 : x
2. Step 2: Convert to fraction form
   31,092.76/42,908.64 = 16,945.61/x
3. Step 3: Cross multiply
   31,092.76x = 42,908.64 × 16,945.61
4. Step 4: Simplify right side
   31,092.76x = 727,112,800.98
5. Step 5: Solve for x
   x = 727,112,800.98/31,092.76
6. Step 6: Final answer
   x = 23,385.28