Finding the Fourth Proportional to 72,139.14, 99,550.16 and 40,308.24

Step by Step Solution

1. Step 1: Write the proportion equation
   72,139.14 : 99,550.16 = 40,308.24 : x
2. Step 2: Convert to fraction form
   72,139.14/99,550.16 = 40,308.24/x
3. Step 3: Cross multiply
   72,139.14x = 99,550.16 × 40,308.24
4. Step 4: Simplify right side
   72,139.14x = 4,012,691,741.32
5. Step 5: Solve for x
   x = 4,012,691,741.32/72,139.14
6. Step 6: Final answer
   x = 55,624.34