Finding the Fourth Proportional to 31,000.32, 42,780.72 and 16,853.19

Step by Step Solution

1. Step 1: Write the proportion equation
   31,000.32 : 42,780.72 = 16,853.19 : x
2. Step 2: Convert to fraction form
   31,000.32/42,780.72 = 16,853.19/x
3. Step 3: Cross multiply
   31,000.32x = 42,780.72 × 16,853.19
4. Step 4: Simplify right side
   31,000.32x = 720,991,602.50
5. Step 5: Solve for x
   x = 720,991,602.50/31,000.32
6. Step 6: Final answer
   x = 23,257.55