Finding the Fourth Proportional to 72,318.01, 99,808.82 and 43,639.15

Step by Step Solution

1. Step 1: Write the proportion equation
   72,318.01 : 99,808.82 = 43,639.15 : x
2. Step 2: Convert to fraction form
   72,318.01/99,808.82 = 43,639.15/x
3. Step 3: Cross multiply
   72,318.01x = 99,808.82 × 43,639.15
4. Step 4: Simplify right side
   72,318.01x = 4,355,572,067.30
5. Step 5: Solve for x
   x = 4,355,572,067.30/72,318.01
6. Step 6: Final answer
   x = 60,228.04