Finding the Fourth Proportional to 1,677.96, 2,514.06 and 810.12

Step by Step Solution

1. Step 1: Write the proportion equation
   1,677.96 : 2,514.06 = 810.12 : x
2. Step 2: Convert to fraction form
   1,677.96/2,514.06 = 810.12/x
3. Step 3: Cross multiply
   1,677.96x = 2,514.06 × 810.12
4. Step 4: Simplify right side
   1,677.96x = 2,036,690.29
5. Step 5: Solve for x
   x = 2,036,690.29/1,677.96
6. Step 6: Final answer
   x = 1,213.79