Finding the Fourth Proportional to 89,499.54, 123,478.62 and 55,495.78

Step by Step Solution

1. Step 1: Write the proportion equation
   89,499.54 : 123,478.62 = 55,495.78 : x
2. Step 2: Convert to fraction form
   89,499.54/123,478.62 = 55,495.78/x
3. Step 3: Cross multiply
   89,499.54x = 123,478.62 × 55,495.78
4. Step 4: Simplify right side
   89,499.54x = 6,852,542,330.22
5. Step 5: Solve for x
   x = 6,852,542,330.22/89,499.54
6. Step 6: Final answer
   x = 76,565.11