Finding the Fourth Proportional to 111,868.69, 154,385.68 and 64,129.22

Step by Step Solution

1. Step 1: Write the proportion equation
   111,868.69 : 154,385.68 = 64,129.22 : x
2. Step 2: Convert to fraction form
   111,868.69/154,385.68 = 64,129.22/x
3. Step 3: Cross multiply
   111,868.69x = 154,385.68 × 64,129.22
4. Step 4: Simplify right side
   111,868.69x = 9,900,632,625.96
5. Step 5: Solve for x
   x = 9,900,632,625.96/111,868.69
6. Step 6: Final answer
   x = 88,502.27