Finding the Fourth Proportional to 31,002, 42,783.20 and 16,854.88

Step by Step Solution

1. Step 1: Write the proportion equation
   31,002 : 42,783.20 = 16,854.88 : x
2. Step 2: Convert to fraction form
   31,002/42,783.20 = 16,854.88/x
3. Step 3: Cross multiply
   31,002x = 42,783.20 × 16,854.88
4. Step 4: Simplify right side
   31,002x = 721,105,702.02
5. Step 5: Solve for x
   x = 721,105,702.02/31,002
6. Step 6: Final answer
   x = 23,259.97