Finding the Fourth Proportional to 2,424.78, 3,638.68 and 1,108.32

Step by Step Solution

1. Step 1: Write the proportion equation
   2,424.78 : 3,638.68 = 1,108.32 : x
2. Step 2: Convert to fraction form
   2,424.78/3,638.68 = 1,108.32/x
3. Step 3: Cross multiply
   2,424.78x = 3,638.68 × 1,108.32
4. Step 4: Simplify right side
   2,424.78x = 4,032,821.82
5. Step 5: Solve for x
   x = 4,032,821.82/2,424.78
6. Step 6: Final answer
   x = 1,663.17