Finding the Fourth Proportional to 80,050.74, 120,148.80 and 42,642.71

Step by Step Solution

1. Step 1: Write the proportion equation
   80,050.74 : 120,148.80 = 42,642.71 : x
2. Step 2: Convert to fraction form
   80,050.74/120,148.80 = 42,642.71/x
3. Step 3: Cross multiply
   80,050.74x = 120,148.80 × 42,642.71
4. Step 4: Simplify right side
   80,050.74x = 5,123,470,435.25
5. Step 5: Solve for x
   x = 5,123,470,435.25/80,050.74
6. Step 6: Final answer
   x = 64,002.79