Finding the Fourth Proportional to 1,341.68, 1,851.61 and 810.69

Step by Step Solution

1. Step 1: Write the proportion equation
   1,341.68 : 1,851.61 = 810.69 : x
2. Step 2: Convert to fraction form
   1,341.68/1,851.61 = 810.69/x
3. Step 3: Cross multiply
   1,341.68x = 1,851.61 × 810.69
4. Step 4: Simplify right side
   1,341.68x = 1,501,084.68
5. Step 5: Solve for x
   x = 1,501,084.68/1,341.68
6. Step 6: Final answer
   x = 1,118.81