Finding the Fourth Proportional to 10,388.02, 14,334.90 and 5,672.20

Step by Step Solution

1. Step 1: Write the proportion equation
   10,388.02 : 14,334.90 = 5,672.20 : x
2. Step 2: Convert to fraction form
   10,388.02/14,334.90 = 5,672.20/x
3. Step 3: Cross multiply
   10,388.02x = 14,334.90 × 5,672.20
4. Step 4: Simplify right side
   10,388.02x = 81,310,419.78
5. Step 5: Solve for x
   x = 81,310,419.78/10,388.02
6. Step 6: Final answer
   x = 7,827.33