Finding the Fourth Proportional to 72,155.34, 99,574.62 and 40,324.76

Step by Step Solution

1. Step 1: Write the proportion equation
   72,155.34 : 99,574.62 = 40,324.76 : x
2. Step 2: Convert to fraction form
   72,155.34/99,574.62 = 40,324.76/x
3. Step 3: Cross multiply
   72,155.34x = 99,574.62 × 40,324.76
4. Step 4: Simplify right side
   72,155.34x = 4,015,322,653.59
5. Step 5: Solve for x
   x = 4,015,322,653.59/72,155.34
6. Step 6: Final answer
   x = 55,648.31