Finding the Fourth Proportional to 1,314.86, 1,814.50 and 717.39

Step by Step Solution

1. Step 1: Write the proportion equation
   1,314.86 : 1,814.50 = 717.39 : x
2. Step 2: Convert to fraction form
   1,314.86/1,814.50 = 717.39/x
3. Step 3: Cross multiply
   1,314.86x = 1,814.50 × 717.39
4. Step 4: Simplify right side
   1,314.86x = 1,301,704.16
5. Step 5: Solve for x
   x = 1,301,704.16/1,314.86
6. Step 6: Final answer
   x = 989.99