Finding the Fourth Proportional to 123,668.56, 170,581.91 and 78,299.25

Step by Step Solution

1. Step 1: Write the proportion equation
   123,668.56 : 170,581.91 = 78,299.25 : x
2. Step 2: Convert to fraction form
   123,668.56/170,581.91 = 78,299.25/x
3. Step 3: Cross multiply
   123,668.56x = 170,581.91 × 78,299.25
4. Step 4: Simplify right side
   123,668.56x = 13,356,435,616.57
5. Step 5: Solve for x
   x = 13,356,435,616.57/123,668.56
6. Step 6: Final answer
   x = 108,001.87