Finding the Fourth Proportional to 3,665.60, 5,058.52 and 1,987.04

Step by Step Solution

1. Step 1: Write the proportion equation
   3,665.60 : 5,058.52 = 1,987.04 : x
2. Step 2: Convert to fraction form
   3,665.60/5,058.52 = 1,987.04/x
3. Step 3: Cross multiply
   3,665.60x = 5,058.52 × 1,987.04
4. Step 4: Simplify right side
   3,665.60x = 10,051,481.58
5. Step 5: Solve for x
   x = 10,051,481.58/3,665.60
6. Step 6: Final answer
   x = 2,742.11