Finding the Fourth Proportional to 1,768.45, 2,651.63 and 672.89

Step by Step Solution

1. Step 1: Write the proportion equation
   1,768.45 : 2,651.63 = 672.89 : x
2. Step 2: Convert to fraction form
   1,768.45/2,651.63 = 672.89/x
3. Step 3: Cross multiply
   1,768.45x = 2,651.63 × 672.89
4. Step 4: Simplify right side
   1,768.45x = 1,784,238.69
5. Step 5: Solve for x
   x = 1,784,238.69/1,768.45
6. Step 6: Final answer
   x = 1,008.93