Finding the Fourth Proportional to 115,968.43, 160,031.95 and 65,667.55

Step by Step Solution

1. Step 1: Write the proportion equation
   115,968.43 : 160,031.95 = 65,667.55 : x
2. Step 2: Convert to fraction form
   115,968.43/160,031.95 = 65,667.55/x
3. Step 3: Cross multiply
   115,968.43x = 160,031.95 × 65,667.55
4. Step 4: Simplify right side
   115,968.43x = 10,508,906,078.22
5. Step 5: Solve for x
   x = 10,508,906,078.22/115,968.43
6. Step 6: Final answer
   x = 90,618.68