Finding the Fourth Proportional to 2,987.47, 4,483.23 and 1,039.69

Step by Step Solution

1. Step 1: Write the proportion equation
   2,987.47 : 4,483.23 = 1,039.69 : x
2. Step 2: Convert to fraction form
   2,987.47/4,483.23 = 1,039.69/x
3. Step 3: Cross multiply
   2,987.47x = 4,483.23 × 1,039.69
4. Step 4: Simplify right side
   2,987.47x = 4,661,169.40
5. Step 5: Solve for x
   x = 4,661,169.40/2,987.47
6. Step 6: Final answer
   x = 1,560.24