Finding the Fourth Proportional to 2,443.60, 3,369.98 and 1,918.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,443.60 : 3,369.98 = 1,918.72 : x
2. Step 2: Convert to fraction form
   2,443.60/3,369.98 = 1,918.72/x
3. Step 3: Cross multiply
   2,443.60x = 3,369.98 × 1,918.72
4. Step 4: Simplify right side
   2,443.60x = 6,466,044.40
5. Step 5: Solve for x
   x = 6,466,044.40/2,443.60
6. Step 6: Final answer
   x = 2,646.12