Finding the Fourth Proportional to 1,334.88, 1,842.42 and 810.78

Step by Step Solution

1. Step 1: Write the proportion equation
   1,334.88 : 1,842.42 = 810.78 : x
2. Step 2: Convert to fraction form
   1,334.88/1,842.42 = 810.78/x
3. Step 3: Cross multiply
   1,334.88x = 1,842.42 × 810.78
4. Step 4: Simplify right side
   1,334.88x = 1,493,797.29
5. Step 5: Solve for x
   x = 1,493,797.29/1,334.88
6. Step 6: Final answer
   x = 1,119.05