Finding the Fourth Proportional to 1,314.79, 1,814.27 and 810.56

Step by Step Solution

1. Step 1: Write the proportion equation
   1,314.79 : 1,814.27 = 810.56 : x
2. Step 2: Convert to fraction form
   1,314.79/1,814.27 = 810.56/x
3. Step 3: Cross multiply
   1,314.79x = 1,814.27 × 810.56
4. Step 4: Simplify right side
   1,314.79x = 1,470,575.17
5. Step 5: Solve for x
   x = 1,470,575.17/1,314.79
6. Step 6: Final answer
   x = 1,118.49