Finding the Fourth Proportional to 1,839.56, 2,537.30 and 1,209.89

Step by Step Solution

1. Step 1: Write the proportion equation
   1,839.56 : 2,537.30 = 1,209.89 : x
2. Step 2: Convert to fraction form
   1,839.56/2,537.30 = 1,209.89/x
3. Step 3: Cross multiply
   1,839.56x = 2,537.30 × 1,209.89
4. Step 4: Simplify right side
   1,839.56x = 3,069,841.21
5. Step 5: Solve for x
   x = 3,069,841.21/1,839.56
6. Step 6: Final answer
   x = 1,668.80