Finding the Fourth Proportional to 1,782.42, 2,459.56 and 1,223.38

Step by Step Solution

1. Step 1: Write the proportion equation
   1,782.42 : 2,459.56 = 1,223.38 : x
2. Step 2: Convert to fraction form
   1,782.42/2,459.56 = 1,223.38/x
3. Step 3: Cross multiply
   1,782.42x = 2,459.56 × 1,223.38
4. Step 4: Simplify right side
   1,782.42x = 3,008,976.51
5. Step 5: Solve for x
   x = 3,008,976.51/1,782.42
6. Step 6: Final answer
   x = 1,688.14