Finding the Fourth Proportional to 2,369.42, 3,554.12 and 809.60

Step by Step Solution

1. Step 1: Write the proportion equation
   2,369.42 : 3,554.12 = 809.60 : x
2. Step 2: Convert to fraction form
   2,369.42/3,554.12 = 809.60/x
3. Step 3: Cross multiply
   2,369.42x = 3,554.12 × 809.60
4. Step 4: Simplify right side
   2,369.42x = 2,877,411.50
5. Step 5: Solve for x
   x = 2,877,411.50/2,369.42
6. Step 6: Final answer
   x = 1,214.39