Finding the Fourth Proportional to 1,875.65, 2,589.50 and 1,287.05

Step by Step Solution

1. Step 1: Write the proportion equation
   1,875.65 : 2,589.50 = 1,287.05 : x
2. Step 2: Convert to fraction form
   1,875.65/2,589.50 = 1,287.05/x
3. Step 3: Cross multiply
   1,875.65x = 2,589.50 × 1,287.05
4. Step 4: Simplify right side
   1,875.65x = 3,332,815.98
5. Step 5: Solve for x
   x = 3,332,815.98/1,875.65
6. Step 6: Final answer
   x = 1,776.89