Finding the Fourth Proportional to 1,711.38, 2,568.42 and 981.30

Step by Step Solution

1. Step 1: Write the proportion equation
   1,711.38 : 2,568.42 = 981.30 : x
2. Step 2: Convert to fraction form
   1,711.38/2,568.42 = 981.30/x
3. Step 3: Cross multiply
   1,711.38x = 2,568.42 × 981.30
4. Step 4: Simplify right side
   1,711.38x = 2,520,390.55
5. Step 5: Solve for x
   x = 2,520,390.55/1,711.38
6. Step 6: Final answer
   x = 1,472.72