Finding the Fourth Proportional to 72,258.05, 99,750.20 and 54,359.88

Step by Step Solution

1. Step 1: Write the proportion equation
   72,258.05 : 99,750.20 = 54,359.88 : x
2. Step 2: Convert to fraction form
   72,258.05/99,750.20 = 54,359.88/x
3. Step 3: Cross multiply
   72,258.05x = 99,750.20 × 54,359.88
4. Step 4: Simplify right side
   72,258.05x = 5,422,408,630.18
5. Step 5: Solve for x
   x = 5,422,408,630.18/72,258.05
6. Step 6: Final answer
   x = 75,042.28