Finding the Fourth Proportional to 10,287.19, 14,196.34 and 5,571.47

Step by Step Solution

1. Step 1: Write the proportion equation
   10,287.19 : 14,196.34 = 5,571.47 : x
2. Step 2: Convert to fraction form
   10,287.19/14,196.34 = 5,571.47/x
3. Step 3: Cross multiply
   10,287.19x = 14,196.34 × 5,571.47
4. Step 4: Simplify right side
   10,287.19x = 79,094,419.07
5. Step 5: Solve for x
   x = 79,094,419.07/10,287.19
6. Step 6: Final answer
   x = 7,688.64