Finding the Fourth Proportional to 2,399.78, 3,312.27 and 1,603.14

Step by Step Solution

1. Step 1: Write the proportion equation
   2,399.78 : 3,312.27 = 1,603.14 : x
2. Step 2: Convert to fraction form
   2,399.78/3,312.27 = 1,603.14/x
3. Step 3: Cross multiply
   2,399.78x = 3,312.27 × 1,603.14
4. Step 4: Simplify right side
   2,399.78x = 5,310,032.53
5. Step 5: Solve for x
   x = 5,310,032.53/2,399.78
6. Step 6: Final answer
   x = 2,212.72