Finding the Fourth Proportional to 10,047.90, 13,866.18 and 5,571.39

Step by Step Solution

1. Step 1: Write the proportion equation
   10,047.90 : 13,866.18 = 5,571.39 : x
2. Step 2: Convert to fraction form
   10,047.90/13,866.18 = 5,571.39/x
3. Step 3: Cross multiply
   10,047.90x = 13,866.18 × 5,571.39
4. Step 4: Simplify right side
   10,047.90x = 77,253,896.59
5. Step 5: Solve for x
   x = 77,253,896.59/10,047.90
6. Step 6: Final answer
   x = 7,688.56