Finding the Fourth Proportional to 87,995.10, 121,401.42 and 57,796.80

Step by Step Solution

1. Step 1: Write the proportion equation
   87,995.10 : 121,401.42 = 57,796.80 : x
2. Step 2: Convert to fraction form
   87,995.10/121,401.42 = 57,796.80/x
3. Step 3: Cross multiply
   87,995.10x = 121,401.42 × 57,796.80
4. Step 4: Simplify right side
   87,995.10x = 7,016,613,591.46
5. Step 5: Solve for x
   x = 7,016,613,591.46/87,995.10
6. Step 6: Final answer
   x = 79,738.69