Finding the Fourth Proportional to 131,240.72, 196,918.76 and 68,896.72

Step by Step Solution

1. Step 1: Write the proportion equation
   131,240.72 : 196,918.76 = 68,896.72 : x
2. Step 2: Convert to fraction form
   131,240.72/196,918.76 = 68,896.72/x
3. Step 3: Cross multiply
   131,240.72x = 196,918.76 × 68,896.72
4. Step 4: Simplify right side
   131,240.72x = 13,567,056,670.47
5. Step 5: Solve for x
   x = 13,567,056,670.47/131,240.72
6. Step 6: Final answer
   x = 103,375.36