Finding the Fourth Proportional to 1,870.88, 2,582.06 and 1,209.65

Step by Step Solution

1. Step 1: Write the proportion equation
   1,870.88 : 2,582.06 = 1,209.65 : x
2. Step 2: Convert to fraction form
   1,870.88/2,582.06 = 1,209.65/x
3. Step 3: Cross multiply
   1,870.88x = 2,582.06 × 1,209.65
4. Step 4: Simplify right side
   1,870.88x = 3,123,388.88
5. Step 5: Solve for x
   x = 3,123,388.88/1,870.88
6. Step 6: Final answer
   x = 1,669.48