Finding the Fourth Proportional to 78,760.72, 118,196.48 and 71,231.92

Step by Step Solution

1. Step 1: Write the proportion equation
   78,760.72 : 118,196.48 = 71,231.92 : x
2. Step 2: Convert to fraction form
   78,760.72/118,196.48 = 71,231.92/x
3. Step 3: Cross multiply
   78,760.72x = 118,196.48 × 71,231.92
4. Step 4: Simplify right side
   78,760.72x = 8,419,362,207.64
5. Step 5: Solve for x
   x = 8,419,362,207.64/78,760.72
6. Step 6: Final answer
   x = 106,897.98