Finding the Fourth Proportional to 80,756, 111,443.60 and 45,428

Step by Step Solution

1. Step 1: Write the proportion equation
   80,756 : 111,443.60 = 45,428 : x
2. Step 2: Convert to fraction form
   80,756/111,443.60 = 45,428/x
3. Step 3: Cross multiply
   80,756x = 111,443.60 × 45,428
4. Step 4: Simplify right side
   80,756x = 5,062,659,860.80
5. Step 5: Solve for x
   x = 5,062,659,860.80/80,756
6. Step 6: Final answer
   x = 62,690.82