Finding the Fourth Proportional to 3,061.72, 4,571.79 and 2,978.69

Step by Step Solution

1. Step 1: Write the proportion equation
   3,061.72 : 4,571.79 = 2,978.69 : x
2. Step 2: Convert to fraction form
   3,061.72/4,571.79 = 2,978.69/x
3. Step 3: Cross multiply
   3,061.72x = 4,571.79 × 2,978.69
4. Step 4: Simplify right side
   3,061.72x = 13,617,934.31
5. Step 5: Solve for x
   x = 13,617,934.31/3,061.72
6. Step 6: Final answer
   x = 4,447.80