Finding the Fourth Proportional to 9,967.50, 13,755.16 and 5,778.18

Step by Step Solution

1. Step 1: Write the proportion equation
   9,967.50 : 13,755.16 = 5,778.18 : x
2. Step 2: Convert to fraction form
   9,967.50/13,755.16 = 5,778.18/x
3. Step 3: Cross multiply
   9,967.50x = 13,755.16 × 5,778.18
4. Step 4: Simplify right side
   9,967.50x = 79,479,790.41
5. Step 5: Solve for x
   x = 79,479,790.41/9,967.50
6. Step 6: Final answer
   x = 7,973.89