Finding the Fourth Proportional to 123,610.24, 170,519.34 and 78,211.72

Step by Step Solution

1. Step 1: Write the proportion equation
   123,610.24 : 170,519.34 = 78,211.72 : x
2. Step 2: Convert to fraction form
   123,610.24/170,519.34 = 78,211.72/x
3. Step 3: Cross multiply
   123,610.24x = 170,519.34 × 78,211.72
4. Step 4: Simplify right side
   123,610.24x = 13,336,610,874.66
5. Step 5: Solve for x
   x = 13,336,610,874.66/123,610.24
6. Step 6: Final answer
   x = 107,892.44