Finding the Fourth Proportional to 111,789.64, 154,269.59 and 64,043.18

Step by Step Solution

1. Step 1: Write the proportion equation
   111,789.64 : 154,269.59 = 64,043.18 : x
2. Step 2: Convert to fraction form
   111,789.64/154,269.59 = 64,043.18/x
3. Step 3: Cross multiply
   111,789.64x = 154,269.59 × 64,043.18
4. Step 4: Simplify right side
   111,789.64x = 9,879,915,120.90
5. Step 5: Solve for x
   x = 9,879,915,120.90/111,789.64
6. Step 6: Final answer
   x = 88,379.52