Finding the Fourth Proportional to 8,799.38, 12,156.33 and 5,781.68

Step by Step Solution

1. Step 1: Write the proportion equation
   8,799.38 : 12,156.33 = 5,781.68 : x
2. Step 2: Convert to fraction form
   8,799.38/12,156.33 = 5,781.68/x
3. Step 3: Cross multiply
   8,799.38x = 12,156.33 × 5,781.68
4. Step 4: Simplify right side
   8,799.38x = 70,284,010.03
5. Step 5: Solve for x
   x = 70,284,010.03/8,799.38
6. Step 6: Final answer
   x = 7,987.38