Finding the Fourth Proportional to 115,984.16, 160,069.34 and 65,005.48

Step by Step Solution

1. Step 1: Write the proportion equation
   115,984.16 : 160,069.34 = 65,005.48 : x
2. Step 2: Convert to fraction form
   115,984.16/160,069.34 = 65,005.48/x
3. Step 3: Cross multiply
   115,984.16x = 160,069.34 × 65,005.48
4. Step 4: Simplify right side
   115,984.16x = 10,405,383,154.61
5. Step 5: Solve for x
   x = 10,405,383,154.61/115,984.16
6. Step 6: Final answer
   x = 89,713.83