Finding the Fourth Proportional to 72,155.86, 99,574.76 and 40,324.74

Step by Step Solution

1. Step 1: Write the proportion equation
   72,155.86 : 99,574.76 = 40,324.74 : x
2. Step 2: Convert to fraction form
   72,155.86/99,574.76 = 40,324.74/x
3. Step 3: Cross multiply
   72,155.86x = 99,574.76 × 40,324.74
4. Step 4: Simplify right side
   72,155.86x = 4,015,326,307.56
5. Step 5: Solve for x
   x = 4,015,326,307.56/72,155.86
6. Step 6: Final answer
   x = 55,647.96