Finding the Fourth Proportional to 79,764.78, 109,973.16 and 65,371.62

Step by Step Solution

1. Step 1: Write the proportion equation
   79,764.78 : 109,973.16 = 65,371.62 : x
2. Step 2: Convert to fraction form
   79,764.78/109,973.16 = 65,371.62/x
3. Step 3: Cross multiply
   79,764.78x = 109,973.16 × 65,371.62
4. Step 4: Simplify right side
   79,764.78x = 7,189,123,625.72
5. Step 5: Solve for x
   x = 7,189,123,625.72/79,764.78
6. Step 6: Final answer
   x = 90,129.05