Finding the Fourth Proportional to 1,781.82, 2,459.23 and 1,310.40

Step by Step Solution

1. Step 1: Write the proportion equation
   1,781.82 : 2,459.23 = 1,310.40 : x
2. Step 2: Convert to fraction form
   1,781.82/2,459.23 = 1,310.40/x
3. Step 3: Cross multiply
   1,781.82x = 2,459.23 × 1,310.40
4. Step 4: Simplify right side
   1,781.82x = 3,222,571.72
5. Step 5: Solve for x
   x = 3,222,571.72/1,781.82
6. Step 6: Final answer
   x = 1,808.58