Finding the Fourth Proportional to 8,781.49, 12,110.20 and 5,792.12

Step by Step Solution

1. Step 1: Write the proportion equation
   8,781.49 : 12,110.20 = 5,792.12 : x
2. Step 2: Convert to fraction form
   8,781.49/12,110.20 = 5,792.12/x
3. Step 3: Cross multiply
   8,781.49x = 12,110.20 × 5,792.12
4. Step 4: Simplify right side
   8,781.49x = 70,143,731.62
5. Step 5: Solve for x
   x = 70,143,731.62/8,781.49
6. Step 6: Final answer
   x = 7,987.68