Finding the Fourth Proportional to 30,789.92, 42,490.57 and 18,040.06

Step by Step Solution

1. Step 1: Write the proportion equation
   30,789.92 : 42,490.57 = 18,040.06 : x
2. Step 2: Convert to fraction form
   30,789.92/42,490.57 = 18,040.06/x
3. Step 3: Cross multiply
   30,789.92x = 42,490.57 × 18,040.06
4. Step 4: Simplify right side
   30,789.92x = 766,532,218.15
5. Step 5: Solve for x
   x = 766,532,218.15/30,789.92
6. Step 6: Final answer
   x = 24,895.55