Finding the Fourth Proportional to 31,085.96, 42,898.56 and 16,938.77

Step by Step Solution

1. Step 1: Write the proportion equation
   31,085.96 : 42,898.56 = 16,938.77 : x
2. Step 2: Convert to fraction form
   31,085.96/42,898.56 = 16,938.77/x
3. Step 3: Cross multiply
   31,085.96x = 42,898.56 × 16,938.77
4. Step 4: Simplify right side
   31,085.96x = 726,648,841.17
5. Step 5: Solve for x
   x = 726,648,841.17/31,085.96
6. Step 6: Final answer
   x = 23,375.47