Finding the Fourth Proportional to 1,643.59, 2,464.74 and 669.34

Step by Step Solution

1. Step 1: Write the proportion equation
   1,643.59 : 2,464.74 = 669.34 : x
2. Step 2: Convert to fraction form
   1,643.59/2,464.74 = 669.34/x
3. Step 3: Cross multiply
   1,643.59x = 2,464.74 × 669.34
4. Step 4: Simplify right side
   1,643.59x = 1,649,749.07
5. Step 5: Solve for x
   x = 1,649,749.07/1,643.59
6. Step 6: Final answer
   x = 1,003.75