Finding the Fourth Proportional to 31,248.91, 43,123.30 and 17,819.87

Step by Step Solution

1. Step 1: Write the proportion equation
   31,248.91 : 43,123.30 = 17,819.87 : x
2. Step 2: Convert to fraction form
   31,248.91/43,123.30 = 17,819.87/x
3. Step 3: Cross multiply
   31,248.91x = 43,123.30 × 17,819.87
4. Step 4: Simplify right side
   31,248.91x = 768,451,440.04
5. Step 5: Solve for x
   x = 768,451,440.04/31,248.91
6. Step 6: Final answer
   x = 24,591.31