Finding the Fourth Proportional to 31,007.04, 42,789.42 and 16,860

Step by Step Solution

1. Step 1: Write the proportion equation
   31,007.04 : 42,789.42 = 16,860 : x
2. Step 2: Convert to fraction form
   31,007.04/42,789.42 = 16,860/x
3. Step 3: Cross multiply
   31,007.04x = 42,789.42 × 16,860
4. Step 4: Simplify right side
   31,007.04x = 721,429,621.20
5. Step 5: Solve for x
   x = 721,429,621.20/31,007.04
6. Step 6: Final answer
   x = 23,266.64