Finding the Fourth Proportional to 72,078.88, 99,468.66 and 40,255.34

Step by Step Solution

1. Step 1: Write the proportion equation
   72,078.88 : 99,468.66 = 40,255.34 : x
2. Step 2: Convert to fraction form
   72,078.88/99,468.66 = 40,255.34/x
3. Step 3: Cross multiply
   72,078.88x = 99,468.66 × 40,255.34
4. Step 4: Simplify right side
   72,078.88x = 4,004,144,727.64
5. Step 5: Solve for x
   x = 4,004,144,727.64/72,078.88
6. Step 6: Final answer
   x = 55,552.26