Finding the Fourth Proportional to 80,836.24, 121,146.90 and 42,877.69

Step by Step Solution

1. Step 1: Write the proportion equation
   80,836.24 : 121,146.90 = 42,877.69 : x
2. Step 2: Convert to fraction form
   80,836.24/121,146.90 = 42,877.69/x
3. Step 3: Cross multiply
   80,836.24x = 121,146.90 × 42,877.69
4. Step 4: Simplify right side
   80,836.24x = 5,194,499,571.57
5. Step 5: Solve for x
   x = 5,194,499,571.57/80,836.24
6. Step 6: Final answer
   x = 64,259.54