Finding the Fourth Proportional to 7,186.82, 10,778.61 and 1,993.10

Step by Step Solution

1. Step 1: Write the proportion equation
   7,186.82 : 10,778.61 = 1,993.10 : x
2. Step 2: Convert to fraction form
   7,186.82/10,778.61 = 1,993.10/x
3. Step 3: Cross multiply
   7,186.82x = 10,778.61 × 1,993.10
4. Step 4: Simplify right side
   7,186.82x = 21,482,847.59
5. Step 5: Solve for x
   x = 21,482,847.59/7,186.82
6. Step 6: Final answer
   x = 2,989.20