Finding the Fourth Proportional to 123,485.88, 170,320.41 and 78,171.24

Step by Step Solution

1. Step 1: Write the proportion equation
   123,485.88 : 170,320.41 = 78,171.24 : x
2. Step 2: Convert to fraction form
   123,485.88/170,320.41 = 78,171.24/x
3. Step 3: Cross multiply
   123,485.88x = 170,320.41 × 78,171.24
4. Step 4: Simplify right side
   123,485.88x = 13,314,157,647.01
5. Step 5: Solve for x
   x = 13,314,157,647.01/123,485.88
6. Step 6: Final answer
   x = 107,819.27