Finding the Fourth Proportional to 1,808.91, 2,496.30 and 1,218.42

Step by Step Solution

1. Step 1: Write the proportion equation
   1,808.91 : 2,496.30 = 1,218.42 : x
2. Step 2: Convert to fraction form
   1,808.91/2,496.30 = 1,218.42/x
3. Step 3: Cross multiply
   1,808.91x = 2,496.30 × 1,218.42
4. Step 4: Simplify right side
   1,808.91x = 3,041,541.85
5. Step 5: Solve for x
   x = 3,041,541.85/1,808.91
6. Step 6: Final answer
   x = 1,681.42