Finding the Fourth Proportional to 1,989.27, 2,982.88 and 1,052.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,989.27 : 2,982.88 = 1,052.72 : x
2. Step 2: Convert to fraction form
   1,989.27/2,982.88 = 1,052.72/x
3. Step 3: Cross multiply
   1,989.27x = 2,982.88 × 1,052.72
4. Step 4: Simplify right side
   1,989.27x = 3,140,117.26
5. Step 5: Solve for x
   x = 3,140,117.26/1,989.27
6. Step 6: Final answer
   x = 1,578.53