Finding the Fourth Proportional to 115,868.20, 159,899 and 65,566.12

Step by Step Solution

1. Step 1: Write the proportion equation
   115,868.20 : 159,899 = 65,566.12 : x
2. Step 2: Convert to fraction form
   115,868.20/159,899 = 65,566.12/x
3. Step 3: Cross multiply
   115,868.20x = 159,899 × 65,566.12
4. Step 4: Simplify right side
   115,868.20x = 10,483,957,021.88
5. Step 5: Solve for x
   x = 10,483,957,021.88/115,868.20
6. Step 6: Final answer
   x = 90,481.75