Finding the Fourth Proportional to 111,586.60, 154,043.94 and 87,636.52

Step by Step Solution

1. Step 1: Write the proportion equation
   111,586.60 : 154,043.94 = 87,636.52 : x
2. Step 2: Convert to fraction form
   111,586.60/154,043.94 = 87,636.52/x
3. Step 3: Cross multiply
   111,586.60x = 154,043.94 × 87,636.52
4. Step 4: Simplify right side
   111,586.60x = 13,499,874,828.69
5. Step 5: Solve for x
   x = 13,499,874,828.69/111,586.60
6. Step 6: Final answer
   x = 120,981.15