Finding the Fourth Proportional to 1,535.42, 2,303.94 and 668.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,535.42 : 2,303.94 = 668.72 : x
2. Step 2: Convert to fraction form
   1,535.42/2,303.94 = 668.72/x
3. Step 3: Cross multiply
   1,535.42x = 2,303.94 × 668.72
4. Step 4: Simplify right side
   1,535.42x = 1,540,690.76
5. Step 5: Solve for x
   x = 1,540,690.76/1,535.42
6. Step 6: Final answer
   x = 1,003.43