Finding the Fourth Proportional to 30,780.72, 42,487.92 and 18,037.98

Step by Step Solution

1. Step 1: Write the proportion equation
   30,780.72 : 42,487.92 = 18,037.98 : x
2. Step 2: Convert to fraction form
   30,780.72/42,487.92 = 18,037.98/x
3. Step 3: Cross multiply
   30,780.72x = 42,487.92 × 18,037.98
4. Step 4: Simplify right side
   30,780.72x = 766,396,251.20
5. Step 5: Solve for x
   x = 766,396,251.20/30,780.72
6. Step 6: Final answer
   x = 24,898.58