Finding the Fourth Proportional to 31,085.38, 42,897.84 and 16,938.24

Step by Step Solution

1. Step 1: Write the proportion equation
   31,085.38 : 42,897.84 = 16,938.24 : x
2. Step 2: Convert to fraction form
   31,085.38/42,897.84 = 16,938.24/x
3. Step 3: Cross multiply
   31,085.38x = 42,897.84 × 16,938.24
4. Step 4: Simplify right side
   31,085.38x = 726,613,909.40
5. Step 5: Solve for x
   x = 726,613,909.40/31,085.38
6. Step 6: Final answer
   x = 23,374.78