Finding the Fourth Proportional to 8,781.90, 12,109.82 and 5,793.81

Step by Step Solution

1. Step 1: Write the proportion equation
   8,781.90 : 12,109.82 = 5,793.81 : x
2. Step 2: Convert to fraction form
   8,781.90/12,109.82 = 5,793.81/x
3. Step 3: Cross multiply
   8,781.90x = 12,109.82 × 5,793.81
4. Step 4: Simplify right side
   8,781.90x = 70,161,967.25
5. Step 5: Solve for x
   x = 70,161,967.25/8,781.90
6. Step 6: Final answer
   x = 7,989.38