Finding the Fourth Proportional to 80,830.10, 111,548.98 and 45,020.12

Step by Step Solution

1. Step 1: Write the proportion equation
   80,830.10 : 111,548.98 = 45,020.12 : x
2. Step 2: Convert to fraction form
   80,830.10/111,548.98 = 45,020.12/x
3. Step 3: Cross multiply
   80,830.10x = 111,548.98 × 45,020.12
4. Step 4: Simplify right side
   80,830.10x = 5,021,948,465.48
5. Step 5: Solve for x
   x = 5,021,948,465.48/80,830.10
6. Step 6: Final answer
   x = 62,129.68