Finding the Fourth Proportional to 10,047.98, 13,866.21 and 5,571.78

Step by Step Solution

1. Step 1: Write the proportion equation
   10,047.98 : 13,866.21 = 5,571.78 : x
2. Step 2: Convert to fraction form
   10,047.98/13,866.21 = 5,571.78/x
3. Step 3: Cross multiply
   10,047.98x = 13,866.21 × 5,571.78
4. Step 4: Simplify right side
   10,047.98x = 77,259,471.55
5. Step 5: Solve for x
   x = 77,259,471.55/10,047.98
6. Step 6: Final answer
   x = 7,689.06