Finding the Fourth Proportional to 31,116.38, 42,940.60 and 16,969.32

Step by Step Solution

1. Step 1: Write the proportion equation
   31,116.38 : 42,940.60 = 16,969.32 : x
2. Step 2: Convert to fraction form
   31,116.38/42,940.60 = 16,969.32/x
3. Step 3: Cross multiply
   31,116.38x = 42,940.60 × 16,969.32
4. Step 4: Simplify right side
   31,116.38x = 728,672,739.97
5. Step 5: Solve for x
   x = 728,672,739.97/31,116.38
6. Step 6: Final answer
   x = 23,417.66