Finding the Fourth Proportional to 8,968.35, 12,381.86 and 5,782.78

Step by Step Solution

1. Step 1: Write the proportion equation
   8,968.35 : 12,381.86 = 5,782.78 : x
2. Step 2: Convert to fraction form
   8,968.35/12,381.86 = 5,782.78/x
3. Step 3: Cross multiply
   8,968.35x = 12,381.86 × 5,782.78
4. Step 4: Simplify right side
   8,968.35x = 71,601,532.66
5. Step 5: Solve for x
   x = 71,601,532.66/8,968.35
6. Step 6: Final answer
   x = 7,983.80