Finding the Fourth Proportional to 1,568.37, 2,353.38 and 1,139.07

Step by Step Solution

1. Step 1: Write the proportion equation
   1,568.37 : 2,353.38 = 1,139.07 : x
2. Step 2: Convert to fraction form
   1,568.37/2,353.38 = 1,139.07/x
3. Step 3: Cross multiply
   1,568.37x = 2,353.38 × 1,139.07
4. Step 4: Simplify right side
   1,568.37x = 2,680,664.56
5. Step 5: Solve for x
   x = 2,680,664.56/1,568.37
6. Step 6: Final answer
   x = 1,709.20