Finding the Fourth Proportional to 1,987.50, 2,742.33 and 1,148.07

Step by Step Solution

1. Step 1: Write the proportion equation
   1,987.50 : 2,742.33 = 1,148.07 : x
2. Step 2: Convert to fraction form
   1,987.50/2,742.33 = 1,148.07/x
3. Step 3: Cross multiply
   1,987.50x = 2,742.33 × 1,148.07
4. Step 4: Simplify right side
   1,987.50x = 3,148,386.80
5. Step 5: Solve for x
   x = 3,148,386.80/1,987.50
6. Step 6: Final answer
   x = 1,584.09