Finding the Fourth Proportional to 72,289.86, 99,759.99 and 40,458.76

Step by Step Solution

1. Step 1: Write the proportion equation
   72,289.86 : 99,759.99 = 40,458.76 : x
2. Step 2: Convert to fraction form
   72,289.86/99,759.99 = 40,458.76/x
3. Step 3: Cross multiply
   72,289.86x = 99,759.99 × 40,458.76
4. Step 4: Simplify right side
   72,289.86x = 4,036,165,091.89
5. Step 5: Solve for x
   x = 4,036,165,091.89/72,289.86
6. Step 6: Final answer
   x = 55,833.08