Finding the Fourth Proportional to 2,308.62, 3,463.16 and 921.63

Step by Step Solution

1. Step 1: Write the proportion equation
   2,308.62 : 3,463.16 = 921.63 : x
2. Step 2: Convert to fraction form
   2,308.62/3,463.16 = 921.63/x
3. Step 3: Cross multiply
   2,308.62x = 3,463.16 × 921.63
4. Step 4: Simplify right side
   2,308.62x = 3,191,741.05
5. Step 5: Solve for x
   x = 3,191,741.05/2,308.62
6. Step 6: Final answer
   x = 1,382.53