Finding the Fourth Proportional to 80,049.74, 120,147.30 and 42,641.71

Step by Step Solution

1. Step 1: Write the proportion equation
   80,049.74 : 120,147.30 = 42,641.71 : x
2. Step 2: Convert to fraction form
   80,049.74/120,147.30 = 42,641.71/x
3. Step 3: Cross multiply
   80,049.74x = 120,147.30 × 42,641.71
4. Step 4: Simplify right side
   80,049.74x = 5,123,286,023.51
5. Step 5: Solve for x
   x = 5,123,286,023.51/80,049.74
6. Step 6: Final answer
   x = 64,001.29