Finding the Fourth Proportional to 31,085.88, 42,898.52 and 16,938.72

Step by Step Solution

1. Step 1: Write the proportion equation
   31,085.88 : 42,898.52 = 16,938.72 : x
2. Step 2: Convert to fraction form
   31,085.88/42,898.52 = 16,938.72/x
3. Step 3: Cross multiply
   31,085.88x = 42,898.52 × 16,938.72
4. Step 4: Simplify right side
   31,085.88x = 726,646,018.69
5. Step 5: Solve for x
   x = 726,646,018.69/31,085.88
6. Step 6: Final answer
   x = 23,375.44