Finding the Fourth Proportional to 123,196.78, 170,011.18 and 66,608.15

Step by Step Solution

1. Step 1: Write the proportion equation
   123,196.78 : 170,011.18 = 66,608.15 : x
2. Step 2: Convert to fraction form
   123,196.78/170,011.18 = 66,608.15/x
3. Step 3: Cross multiply
   123,196.78x = 170,011.18 × 66,608.15
4. Step 4: Simplify right side
   123,196.78x = 11,324,130,179.12
5. Step 5: Solve for x
   x = 11,324,130,179.12/123,196.78
6. Step 6: Final answer
   x = 91,919.04