Finding the Fourth Proportional to 31,085.75, 42,898.34 and 16,938.59

Step by Step Solution

1. Step 1: Write the proportion equation
   31,085.75 : 42,898.34 = 16,938.59 : x
2. Step 2: Convert to fraction form
   31,085.75/42,898.34 = 16,938.59/x
3. Step 3: Cross multiply
   31,085.75x = 42,898.34 × 16,938.59
4. Step 4: Simplify right side
   31,085.75x = 726,637,392.94
5. Step 5: Solve for x
   x = 726,637,392.94/31,085.75
6. Step 6: Final answer
   x = 23,375.26