Finding the Fourth Proportional to 31,146.34, 42,981.31 and 16,999.18

Step by Step Solution

1. Step 1: Write the proportion equation
   31,146.34 : 42,981.31 = 16,999.18 : x
2. Step 2: Convert to fraction form
   31,146.34/42,981.31 = 16,999.18/x
3. Step 3: Cross multiply
   31,146.34x = 42,981.31 × 16,999.18
4. Step 4: Simplify right side
   31,146.34x = 730,647,025.33
5. Step 5: Solve for x
   x = 730,647,025.33/31,146.34
6. Step 6: Final answer
   x = 23,458.52