Finding the Fourth Proportional to 80,456.38, 120,717.38 and 64,808.39

Step by Step Solution

1. Step 1: Write the proportion equation
   80,456.38 : 120,717.38 = 64,808.39 : x
2. Step 2: Convert to fraction form
   80,456.38/120,717.38 = 64,808.39/x
3. Step 3: Cross multiply
   80,456.38x = 120,717.38 × 64,808.39
4. Step 4: Simplify right side
   80,456.38x = 7,823,499,506.63
5. Step 5: Solve for x
   x = 7,823,499,506.63/80,456.38
6. Step 6: Final answer
   x = 97,239.02