Finding the Fourth Proportional to 1,334.40, 1,841.36 and 810.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,334.40 : 1,841.36 = 810.72 : x
2. Step 2: Convert to fraction form
   1,334.40/1,841.36 = 810.72/x
3. Step 3: Cross multiply
   1,334.40x = 1,841.36 × 810.72
4. Step 4: Simplify right side
   1,334.40x = 1,492,827.38
5. Step 5: Solve for x
   x = 1,492,827.38/1,334.40
6. Step 6: Final answer
   x = 1,118.73