Finding the Fourth Proportional to 80,747.76, 111,431.92 and 45,419.76

Step by Step Solution

1. Step 1: Write the proportion equation
   80,747.76 : 111,431.92 = 45,419.76 : x
2. Step 2: Convert to fraction form
   80,747.76/111,431.92 = 45,419.76/x
3. Step 3: Cross multiply
   80,747.76x = 111,431.92 × 45,419.76
4. Step 4: Simplify right side
   80,747.76x = 5,061,211,062.74
5. Step 5: Solve for x
   x = 5,061,211,062.74/80,747.76
6. Step 6: Final answer
   x = 62,679.28