Finding the Fourth Proportional to 31,002.32, 42,783.50 and 16,855.46

Step by Step Solution

1. Step 1: Write the proportion equation
   31,002.32 : 42,783.50 = 16,855.46 : x
2. Step 2: Convert to fraction form
   31,002.32/42,783.50 = 16,855.46/x
3. Step 3: Cross multiply
   31,002.32x = 42,783.50 × 16,855.46
4. Step 4: Simplify right side
   31,002.32x = 721,135,488.63
5. Step 5: Solve for x
   x = 721,135,488.63/31,002.32
6. Step 6: Final answer
   x = 23,260.70