Finding the Fourth Proportional to 80,401.57, 110,863.28 and 51,291.11

Step by Step Solution

1. Step 1: Write the proportion equation
   80,401.57 : 110,863.28 = 51,291.11 : x
2. Step 2: Convert to fraction form
   80,401.57/110,863.28 = 51,291.11/x
3. Step 3: Cross multiply
   80,401.57x = 110,863.28 × 51,291.11
4. Step 4: Simplify right side
   80,401.57x = 5,686,301,094.83
5. Step 5: Solve for x
   x = 5,686,301,094.83/80,401.57
6. Step 6: Final answer
   x = 70,723.76