Finding the Fourth Proportional to 131,968.74, 197,922.72 and 78,675.78

Step by Step Solution

1. Step 1: Write the proportion equation
   131,968.74 : 197,922.72 = 78,675.78 : x
2. Step 2: Convert to fraction form
   131,968.74/197,922.72 = 78,675.78/x
3. Step 3: Cross multiply
   131,968.74x = 197,922.72 × 78,675.78
4. Step 4: Simplify right side
   131,968.74x = 15,571,724,375.72
5. Step 5: Solve for x
   x = 15,571,724,375.72/131,968.74
6. Step 6: Final answer
   x = 117,995.55