Finding the Fourth Proportional to 1,314.59, 1,814.44 and 817.61

Step by Step Solution

1. Step 1: Write the proportion equation
   1,314.59 : 1,814.44 = 817.61 : x
2. Step 2: Convert to fraction form
   1,314.59/1,814.44 = 817.61/x
3. Step 3: Cross multiply
   1,314.59x = 1,814.44 × 817.61
4. Step 4: Simplify right side
   1,314.59x = 1,483,493.17
5. Step 5: Solve for x
   x = 1,483,493.17/1,314.59
6. Step 6: Final answer
   x = 1,128.49