Finding the Fourth Proportional to 10,047.99, 13,865.55 and 5,571.57

Step by Step Solution

1. Step 1: Write the proportion equation
   10,047.99 : 13,865.55 = 5,571.57 : x
2. Step 2: Convert to fraction form
   10,047.99/13,865.55 = 5,571.57/x
3. Step 3: Cross multiply
   10,047.99x = 13,865.55 × 5,571.57
4. Step 4: Simplify right side
   10,047.99x = 77,252,934.41
5. Step 5: Solve for x
   x = 77,252,934.41/10,047.99
6. Step 6: Final answer
   x = 7,688.40