Finding the Fourth Proportional to 1,407.62, 1,942.89 and 810.18

Step by Step Solution

1. Step 1: Write the proportion equation
   1,407.62 : 1,942.89 = 810.18 : x
2. Step 2: Convert to fraction form
   1,407.62/1,942.89 = 810.18/x
3. Step 3: Cross multiply
   1,407.62x = 1,942.89 × 810.18
4. Step 4: Simplify right side
   1,407.62x = 1,574,076.85
5. Step 5: Solve for x
   x = 1,574,076.85/1,407.62
6. Step 6: Final answer
   x = 1,118.26