Finding the Fourth Proportional to 5,878.72, 8,800.78 and 5,149.72

Step by Step Solution

1. Step 1: Write the proportion equation
   5,878.72 : 8,800.78 = 5,149.72 : x
2. Step 2: Convert to fraction form
   5,878.72/8,800.78 = 5,149.72/x
3. Step 3: Cross multiply
   5,878.72x = 8,800.78 × 5,149.72
4. Step 4: Simplify right side
   5,878.72x = 45,321,552.78
5. Step 5: Solve for x
   x = 45,321,552.78/5,878.72
6. Step 6: Final answer
   x = 7,709.43