Finding the Fourth Proportional to 10,402.89, 14,355.78 and 5,687.22

Step by Step Solution

1. Step 1: Write the proportion equation
   10,402.89 : 14,355.78 = 5,687.22 : x
2. Step 2: Convert to fraction form
   10,402.89/14,355.78 = 5,687.22/x
3. Step 3: Cross multiply
   10,402.89x = 14,355.78 × 5,687.22
4. Step 4: Simplify right side
   10,402.89x = 81,644,479.13
5. Step 5: Solve for x
   x = 81,644,479.13/10,402.89
6. Step 6: Final answer
   x = 7,848.25