Finding the Fourth Proportional to 31,085.31, 42,896.55 and 16,937.85

Step by Step Solution

1. Step 1: Write the proportion equation
   31,085.31 : 42,896.55 = 16,937.85 : x
2. Step 2: Convert to fraction form
   31,085.31/42,896.55 = 16,937.85/x
3. Step 3: Cross multiply
   31,085.31x = 42,896.55 × 16,937.85
4. Step 4: Simplify right side
   31,085.31x = 726,575,329.42
5. Step 5: Solve for x
   x = 726,575,329.42/31,085.31
6. Step 6: Final answer
   x = 23,373.59