Finding the Fourth Proportional to 87,085.80, 120,147.30 and 49,360.05

Step by Step Solution

1. Step 1: Write the proportion equation
   87,085.80 : 120,147.30 = 49,360.05 : x
2. Step 2: Convert to fraction form
   87,085.80/120,147.30 = 49,360.05/x
3. Step 3: Cross multiply
   87,085.80x = 120,147.30 × 49,360.05
4. Step 4: Simplify right side
   87,085.80x = 5,930,476,735.37
5. Step 5: Solve for x
   x = 5,930,476,735.37/87,085.80
6. Step 6: Final answer
   x = 68,099.24