Finding the Fourth Proportional to 80,864.10, 121,301.55 and 27,555.30

Step by Step Solution

1. Step 1: Write the proportion equation
   80,864.10 : 121,301.55 = 27,555.30 : x
2. Step 2: Convert to fraction form
   80,864.10/121,301.55 = 27,555.30/x
3. Step 3: Cross multiply
   80,864.10x = 121,301.55 × 27,555.30
4. Step 4: Simplify right side
   80,864.10x = 3,342,500,600.72
5. Step 5: Solve for x
   x = 3,342,500,600.72/80,864.10
6. Step 6: Final answer
   x = 41,334.79