Finding the Fourth Proportional to 87,120.56, 120,228.72 and 49,397.28

Step by Step Solution

1. Step 1: Write the proportion equation
   87,120.56 : 120,228.72 = 49,397.28 : x
2. Step 2: Convert to fraction form
   87,120.56/120,228.72 = 49,397.28/x
3. Step 3: Cross multiply
   87,120.56x = 120,228.72 × 49,397.28
4. Step 4: Simplify right side
   87,120.56x = 5,938,971,745.88
5. Step 5: Solve for x
   x = 5,938,971,745.88/87,120.56
6. Step 6: Final answer
   x = 68,169.58