Finding the Fourth Proportional to 80,919.86, 111,669.42 and 45,109.10

Step by Step Solution

1. Step 1: Write the proportion equation
   80,919.86 : 111,669.42 = 45,109.10 : x
2. Step 2: Convert to fraction form
   80,919.86/111,669.42 = 45,109.10/x
3. Step 3: Cross multiply
   80,919.86x = 111,669.42 × 45,109.10
4. Step 4: Simplify right side
   80,919.86x = 5,037,306,475.37
5. Step 5: Solve for x
   x = 5,037,306,475.37/80,919.86
6. Step 6: Final answer
   x = 62,250.56