Finding the Fourth Proportional to 1,871.72, 2,582.34 and 1,209.02

Step by Step Solution

1. Step 1: Write the proportion equation
   1,871.72 : 2,582.34 = 1,209.02 : x
2. Step 2: Convert to fraction form
   1,871.72/2,582.34 = 1,209.02/x
3. Step 3: Cross multiply
   1,871.72x = 2,582.34 × 1,209.02
4. Step 4: Simplify right side
   1,871.72x = 3,122,087.80
5. Step 5: Solve for x
   x = 3,122,087.80/1,871.72
6. Step 6: Final answer
   x = 1,668.04