Finding the Fourth Proportional to 1,987.72, 2,743.18 and 1,148.46

Step by Step Solution

1. Step 1: Write the proportion equation
   1,987.72 : 2,743.18 = 1,148.46 : x
2. Step 2: Convert to fraction form
   1,987.72/2,743.18 = 1,148.46/x
3. Step 3: Cross multiply
   1,987.72x = 2,743.18 × 1,148.46
4. Step 4: Simplify right side
   1,987.72x = 3,150,430.51
5. Step 5: Solve for x
   x = 3,150,430.51/1,987.72
6. Step 6: Final answer
   x = 1,584.95