Finding the Fourth Proportional to 115,389.24, 159,231 and 65,085

Step by Step Solution

1. Step 1: Write the proportion equation
   115,389.24 : 159,231 = 65,085 : x
2. Step 2: Convert to fraction form
   115,389.24/159,231 = 65,085/x
3. Step 3: Cross multiply
   115,389.24x = 159,231 × 65,085
4. Step 4: Simplify right side
   115,389.24x = 10,363,549,635
5. Step 5: Solve for x
   x = 10,363,549,635/115,389.24
6. Step 6: Final answer
   x = 89,813.83