Finding the Fourth Proportional to 31,020.62, 42,807.20 and 16,873.50

Step by Step Solution

1. Step 1: Write the proportion equation
   31,020.62 : 42,807.20 = 16,873.50 : x
2. Step 2: Convert to fraction form
   31,020.62/42,807.20 = 16,873.50/x
3. Step 3: Cross multiply
   31,020.62x = 42,807.20 × 16,873.50
4. Step 4: Simplify right side
   31,020.62x = 722,307,289.20
5. Step 5: Solve for x
   x = 722,307,289.20/31,020.62
6. Step 6: Final answer
   x = 23,284.75