Finding the Fourth Proportional to 31,055.12, 42,854.80 and 16,908

Step by Step Solution

1. Step 1: Write the proportion equation
   31,055.12 : 42,854.80 = 16,908 : x
2. Step 2: Convert to fraction form
   31,055.12/42,854.80 = 16,908/x
3. Step 3: Cross multiply
   31,055.12x = 42,854.80 × 16,908
4. Step 4: Simplify right side
   31,055.12x = 724,588,958.40
5. Step 5: Solve for x
   x = 724,588,958.40/31,055.12
6. Step 6: Final answer
   x = 23,332.35