Finding the Fourth Proportional to 112,206.40, 154,734.24 and 87,046.72

Step by Step Solution

1. Step 1: Write the proportion equation
   112,206.40 : 154,734.24 = 87,046.72 : x
2. Step 2: Convert to fraction form
   112,206.40/154,734.24 = 87,046.72/x
3. Step 3: Cross multiply
   112,206.40x = 154,734.24 × 87,046.72
4. Step 4: Simplify right side
   112,206.40x = 13,469,108,063.69
5. Step 5: Solve for x
   x = 13,469,108,063.69/112,206.40
6. Step 6: Final answer
   x = 120,038.68