Finding the Fourth Proportional to 2,824.65, 3,900.42 and 1,987.25

Step by Step Solution

1. Step 1: Write the proportion equation
   2,824.65 : 3,900.42 = 1,987.25 : x
2. Step 2: Convert to fraction form
   2,824.65/3,900.42 = 1,987.25/x
3. Step 3: Cross multiply
   2,824.65x = 3,900.42 × 1,987.25
4. Step 4: Simplify right side
   2,824.65x = 7,751,090.14
5. Step 5: Solve for x
   x = 7,751,090.14/2,824.65
6. Step 6: Final answer
   x = 2,744.09