Finding the Fourth Proportional to 123,399.54, 170,350.56 and 78,099.48

Step by Step Solution

1. Step 1: Write the proportion equation
   123,399.54 : 170,350.56 = 78,099.48 : x
2. Step 2: Convert to fraction form
   123,399.54/170,350.56 = 78,099.48/x
3. Step 3: Cross multiply
   123,399.54x = 170,350.56 × 78,099.48
4. Step 4: Simplify right side
   123,399.54x = 13,304,290,153.71
5. Step 5: Solve for x
   x = 13,304,290,153.71/123,399.54
6. Step 6: Final answer
   x = 107,814.75