Finding the Fourth Proportional to 31,085.16, 42,897.54 and 16,938.02

Step by Step Solution

1. Step 1: Write the proportion equation
   31,085.16 : 42,897.54 = 16,938.02 : x
2. Step 2: Convert to fraction form
   31,085.16/42,897.54 = 16,938.02/x
3. Step 3: Cross multiply
   31,085.16x = 42,897.54 × 16,938.02
4. Step 4: Simplify right side
   31,085.16x = 726,599,175.98
5. Step 5: Solve for x
   x = 726,599,175.98/31,085.16
6. Step 6: Final answer
   x = 23,374.47