Finding the Fourth Proportional to 5,578.72, 7,698.58 and 3,060.78

Step by Step Solution

1. Step 1: Write the proportion equation
   5,578.72 : 7,698.58 = 3,060.78 : x
2. Step 2: Convert to fraction form
   5,578.72/7,698.58 = 3,060.78/x
3. Step 3: Cross multiply
   5,578.72x = 7,698.58 × 3,060.78
4. Step 4: Simplify right side
   5,578.72x = 23,563,659.69
5. Step 5: Solve for x
   x = 23,563,659.69/5,578.72
6. Step 6: Final answer
   x = 4,223.85