Finding the Fourth Proportional to 89,080.76, 122,884.83 and 55,078.38

Step by Step Solution

1. Step 1: Write the proportion equation
   89,080.76 : 122,884.83 = 55,078.38 : x
2. Step 2: Convert to fraction form
   89,080.76/122,884.83 = 55,078.38/x
3. Step 3: Cross multiply
   89,080.76x = 122,884.83 × 55,078.38
4. Step 4: Simplify right side
   89,080.76x = 6,768,297,362.98
5. Step 5: Solve for x
   x = 6,768,297,362.98/89,080.76
6. Step 6: Final answer
   x = 75,979.34