Finding the Fourth Proportional to 72,108.12, 99,499.32 and 40,272.96

Step by Step Solution

1. Step 1: Write the proportion equation
   72,108.12 : 99,499.32 = 40,272.96 : x
2. Step 2: Convert to fraction form
   72,108.12/99,499.32 = 40,272.96/x
3. Step 3: Cross multiply
   72,108.12x = 99,499.32 × 40,272.96
4. Step 4: Simplify right side
   72,108.12x = 4,007,132,134.39
5. Step 5: Solve for x
   x = 4,007,132,134.39/72,108.12
6. Step 6: Final answer
   x = 55,571.16