Finding the Fourth Proportional to 2,308.56, 3,464.50 and 921.09

Step by Step Solution

1. Step 1: Write the proportion equation
   2,308.56 : 3,464.50 = 921.09 : x
2. Step 2: Convert to fraction form
   2,308.56/3,464.50 = 921.09/x
3. Step 3: Cross multiply
   2,308.56x = 3,464.50 × 921.09
4. Step 4: Simplify right side
   2,308.56x = 3,191,116.31
5. Step 5: Solve for x
   x = 3,191,116.31/2,308.56
6. Step 6: Final answer
   x = 1,382.30