Finding the Fourth Proportional to 111,972.85, 154,519.86 and 64,223.15

Step by Step Solution

1. Step 1: Write the proportion equation
   111,972.85 : 154,519.86 = 64,223.15 : x
2. Step 2: Convert to fraction form
   111,972.85/154,519.86 = 64,223.15/x
3. Step 3: Cross multiply
   111,972.85x = 154,519.86 × 64,223.15
4. Step 4: Simplify right side
   111,972.85x = 9,923,752,146.76
5. Step 5: Solve for x
   x = 9,923,752,146.76/111,972.85
6. Step 6: Final answer
   x = 88,626.41