Finding the Fourth Proportional to 111,585.60, 154,042.56 and 87,635.52

Step by Step Solution

1. Step 1: Write the proportion equation
   111,585.60 : 154,042.56 = 87,635.52 : x
2. Step 2: Convert to fraction form
   111,585.60/154,042.56 = 87,635.52/x
3. Step 3: Cross multiply
   111,585.60x = 154,042.56 × 87,635.52
4. Step 4: Simplify right side
   111,585.60x = 13,499,599,847.73
5. Step 5: Solve for x
   x = 13,499,599,847.73/111,585.60
6. Step 6: Final answer
   x = 120,979.77