Finding the Fourth Proportional to 85,311, 117,714.60 and 49,492.80

Step by Step Solution

1. Step 1: Write the proportion equation
   85,311 : 117,714.60 = 49,492.80 : x
2. Step 2: Convert to fraction form
   85,311/117,714.60 = 49,492.80/x
3. Step 3: Cross multiply
   85,311x = 117,714.60 × 49,492.80
4. Step 4: Simplify right side
   85,311x = 5,826,025,154.88
5. Step 5: Solve for x
   x = 5,826,025,154.88/85,311
6. Step 6: Final answer
   x = 68,291.61