Finding the Fourth Proportional to 31,000.50, 42,780.59 and 16,853.24

Step by Step Solution

1. Step 1: Write the proportion equation
   31,000.50 : 42,780.59 = 16,853.24 : x
2. Step 2: Convert to fraction form
   31,000.50/42,780.59 = 16,853.24/x
3. Step 3: Cross multiply
   31,000.50x = 42,780.59 × 16,853.24
4. Step 4: Simplify right side
   31,000.50x = 720,991,573.30
5. Step 5: Solve for x
   x = 720,991,573.30/31,000.50
6. Step 6: Final answer
   x = 23,257.42