Finding the Fourth Proportional to 31,085.48, 42,897.97 and 16,938.32

Step by Step Solution

1. Step 1: Write the proportion equation
   31,085.48 : 42,897.97 = 16,938.32 : x
2. Step 2: Convert to fraction form
   31,085.48/42,897.97 = 16,938.32/x
3. Step 3: Cross multiply
   31,085.48x = 42,897.97 × 16,938.32
4. Step 4: Simplify right side
   31,085.48x = 726,619,458.52
5. Step 5: Solve for x
   x = 726,619,458.52/31,085.48
6. Step 6: Final answer
   x = 23,374.89