Finding the Fourth Proportional to 1,568.56, 2,164.56 and 938.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,568.56 : 2,164.56 = 938.72 : x
2. Step 2: Convert to fraction form
   1,568.56/2,164.56 = 938.72/x
3. Step 3: Cross multiply
   1,568.56x = 2,164.56 × 938.72
4. Step 4: Simplify right side
   1,568.56x = 2,031,915.76
5. Step 5: Solve for x
   x = 2,031,915.76/1,568.56
6. Step 6: Final answer
   x = 1,295.40