Finding the Fourth Proportional to 1,782.30, 2,460.48 and 1,223

Step by Step Solution

1. Step 1: Write the proportion equation
   1,782.30 : 2,460.48 = 1,223 : x
2. Step 2: Convert to fraction form
   1,782.30/2,460.48 = 1,223/x
3. Step 3: Cross multiply
   1,782.30x = 2,460.48 × 1,223
4. Step 4: Simplify right side
   1,782.30x = 3,009,167.04
5. Step 5: Solve for x
   x = 3,009,167.04/1,782.30
6. Step 6: Final answer
   x = 1,688.36