Finding the Fourth Proportional to 3,665.62, 5,058.54 and 1,987.03

Step by Step Solution

1. Step 1: Write the proportion equation
   3,665.62 : 5,058.54 = 1,987.03 : x
2. Step 2: Convert to fraction form
   3,665.62/5,058.54 = 1,987.03/x
3. Step 3: Cross multiply
   3,665.62x = 5,058.54 × 1,987.03
4. Step 4: Simplify right side
   3,665.62x = 10,051,470.74
5. Step 5: Solve for x
   x = 10,051,470.74/3,665.62
6. Step 6: Final answer
   x = 2,742.09