Finding the Fourth Proportional to 10,387.88, 14,335.43 and 5,672.18

Step by Step Solution

1. Step 1: Write the proportion equation
   10,387.88 : 14,335.43 = 5,672.18 : x
2. Step 2: Convert to fraction form
   10,387.88/14,335.43 = 5,672.18/x
3. Step 3: Cross multiply
   10,387.88x = 14,335.43 × 5,672.18
4. Step 4: Simplify right side
   10,387.88x = 81,313,039.30
5. Step 5: Solve for x
   x = 81,313,039.30/10,387.88
6. Step 6: Final answer
   x = 7,827.69