Finding the Fourth Proportional to 31,112.55, 42,935.30 and 16,965.39

Step by Step Solution

1. Step 1: Write the proportion equation
   31,112.55 : 42,935.30 = 16,965.39 : x
2. Step 2: Convert to fraction form
   31,112.55/42,935.30 = 16,965.39/x
3. Step 3: Cross multiply
   31,112.55x = 42,935.30 × 16,965.39
4. Step 4: Simplify right side
   31,112.55x = 728,414,133.91
5. Step 5: Solve for x
   x = 728,414,133.91/31,112.55
6. Step 6: Final answer
   x = 23,412.23