Finding the Fourth Proportional to 115,992, 160,085.16 and 65,691

Step by Step Solution

1. Step 1: Write the proportion equation
   115,992 : 160,085.16 = 65,691 : x
2. Step 2: Convert to fraction form
   115,992/160,085.16 = 65,691/x
3. Step 3: Cross multiply
   115,992x = 160,085.16 × 65,691
4. Step 4: Simplify right side
   115,992x = 10,516,154,245.56
5. Step 5: Solve for x
   x = 10,516,154,245.56/115,992
6. Step 6: Final answer
   x = 90,662.75