Finding the Fourth Proportional to 89,441.88, 123,421.76 and 49,155.20

Step by Step Solution

1. Step 1: Write the proportion equation
   89,441.88 : 123,421.76 = 49,155.20 : x
2. Step 2: Convert to fraction form
   89,441.88/123,421.76 = 49,155.20/x
3. Step 3: Cross multiply
   89,441.88x = 123,421.76 × 49,155.20
4. Step 4: Simplify right side
   89,441.88x = 6,066,821,297.15
5. Step 5: Solve for x
   x = 6,066,821,297.15/89,441.88
6. Step 6: Final answer
   x = 67,829.76