Finding the Fourth Proportional to 72,230.88, 99,676.80 and 39,966.72

Step by Step Solution

1. Step 1: Write the proportion equation
   72,230.88 : 99,676.80 = 39,966.72 : x
2. Step 2: Convert to fraction form
   72,230.88/99,676.80 = 39,966.72/x
3. Step 3: Cross multiply
   72,230.88x = 99,676.80 × 39,966.72
4. Step 4: Simplify right side
   72,230.88x = 3,983,754,756.10
5. Step 5: Solve for x
   x = 3,983,754,756.10/72,230.88
6. Step 6: Final answer
   x = 55,153.07