Finding the Fourth Proportional to 79,763.78, 109,971.78 and 65,370.62

Step by Step Solution

1. Step 1: Write the proportion equation
   79,763.78 : 109,971.78 = 65,370.62 : x
2. Step 2: Convert to fraction form
   79,763.78/109,971.78 = 65,370.62/x
3. Step 3: Cross multiply
   79,763.78x = 109,971.78 × 65,370.62
4. Step 4: Simplify right side
   79,763.78x = 7,188,923,441.10
5. Step 5: Solve for x
   x = 7,188,923,441.10/79,763.78
6. Step 6: Final answer
   x = 90,127.67