Finding the Fourth Proportional to 80,287.66, 120,649.38 and 42,873.76

Step by Step Solution

1. Step 1: Write the proportion equation
   80,287.66 : 120,649.38 = 42,873.76 : x
2. Step 2: Convert to fraction form
   80,287.66/120,649.38 = 42,873.76/x
3. Step 3: Cross multiply
   80,287.66x = 120,649.38 × 42,873.76
4. Step 4: Simplify right side
   80,287.66x = 5,172,692,562.27
5. Step 5: Solve for x
   x = 5,172,692,562.27/80,287.66
6. Step 6: Final answer
   x = 64,426.99