Finding the Fourth Proportional to 80,830.68, 111,549.80 and 45,020.70

Step by Step Solution

1. Step 1: Write the proportion equation
   80,830.68 : 111,549.80 = 45,020.70 : x
2. Step 2: Convert to fraction form
   80,830.68/111,549.80 = 45,020.70/x
3. Step 3: Cross multiply
   80,830.68x = 111,549.80 × 45,020.70
4. Step 4: Simplify right side
   80,830.68x = 5,022,050,080.86
5. Step 5: Solve for x
   x = 5,022,050,080.86/80,830.68
6. Step 6: Final answer
   x = 62,130.49