Finding the Fourth Proportional to 89,747.12, 123,778.32 and 78,968.72

Step by Step Solution

1. Step 1: Write the proportion equation
   89,747.12 : 123,778.32 = 78,968.72 : x
2. Step 2: Convert to fraction form
   89,747.12/123,778.32 = 78,968.72/x
3. Step 3: Cross multiply
   89,747.12x = 123,778.32 × 78,968.72
4. Step 4: Simplify right side
   89,747.12x = 9,774,615,494.15
5. Step 5: Solve for x
   x = 9,774,615,494.15/89,747.12
6. Step 6: Final answer
   x = 108,912.86