Finding the Fourth Proportional to 123,647.24, 170,570.40 and 78,248.72

Step by Step Solution

1. Step 1: Write the proportion equation
   123,647.24 : 170,570.40 = 78,248.72 : x
2. Step 2: Convert to fraction form
   123,647.24/170,570.40 = 78,248.72/x
3. Step 3: Cross multiply
   123,647.24x = 170,570.40 × 78,248.72
4. Step 4: Simplify right side
   123,647.24x = 13,346,915,469.89
5. Step 5: Solve for x
   x = 13,346,915,469.89/123,647.24
6. Step 6: Final answer
   x = 107,943.50