Finding the Fourth Proportional to 112,765.06, 155,540.82 and 72,529.72

Step by Step Solution

1. Step 1: Write the proportion equation
   112,765.06 : 155,540.82 = 72,529.72 : x
2. Step 2: Convert to fraction form
   112,765.06/155,540.82 = 72,529.72/x
3. Step 3: Cross multiply
   112,765.06x = 155,540.82 × 72,529.72
4. Step 4: Simplify right side
   112,765.06x = 11,281,332,123.17
5. Step 5: Solve for x
   x = 11,281,332,123.17/112,765.06
6. Step 6: Final answer
   x = 100,042.80