Finding the Fourth Proportional to 10,188.90, 15,249.33 and 5,805.18

Step by Step Solution

1. Step 1: Write the proportion equation
   10,188.90 : 15,249.33 = 5,805.18 : x
2. Step 2: Convert to fraction form
   10,188.90/15,249.33 = 5,805.18/x
3. Step 3: Cross multiply
   10,188.90x = 15,249.33 × 5,805.18
4. Step 4: Simplify right side
   10,188.90x = 88,525,105.53
5. Step 5: Solve for x
   x = 88,525,105.53/10,188.90
6. Step 6: Final answer
   x = 8,688.39