Finding the Fourth Proportional to 2,662.16, 3,991.08 and 930.56

Step by Step Solution

1. Step 1: Write the proportion equation
   2,662.16 : 3,991.08 = 930.56 : x
2. Step 2: Convert to fraction form
   2,662.16/3,991.08 = 930.56/x
3. Step 3: Cross multiply
   2,662.16x = 3,991.08 × 930.56
4. Step 4: Simplify right side
   2,662.16x = 3,713,939.40
5. Step 5: Solve for x
   x = 3,713,939.40/2,662.16
6. Step 6: Final answer
   x = 1,395.08