Finding the Fourth Proportional to 115,745.55, 159,728.00 and 65,446.35

Step by Step Solution

1. Step 1: Write the proportion equation
   115,745.55 : 159,728.00 = 65,446.35 : x
2. Step 2: Convert to fraction form
   115,745.55/159,728.00 = 65,446.35/x
3. Step 3: Cross multiply
   115,745.55x = 159,728.00 × 65,446.35
4. Step 4: Simplify right side
   115,745.55x = 10,453,614,265.57
5. Step 5: Solve for x
   x = 10,453,614,265.57/115,745.55
6. Step 6: Final answer
   x = 90,315.47