Finding the Fourth Proportional to 1,711.86, 2,568.61 and 931.83

Step by Step Solution

1. Step 1: Write the proportion equation
   1,711.86 : 2,568.61 = 931.83 : x
2. Step 2: Convert to fraction form
   1,711.86/2,568.61 = 931.83/x
3. Step 3: Cross multiply
   1,711.86x = 2,568.61 × 931.83
4. Step 4: Simplify right side
   1,711.86x = 2,393,507.86
5. Step 5: Solve for x
   x = 2,393,507.86/1,711.86
6. Step 6: Final answer
   x = 1,398.19