Finding the Fourth Proportional to 1,289.23, 1,933.86 and 672.82

Step by Step Solution

1. Step 1: Write the proportion equation
   1,289.23 : 1,933.86 = 672.82 : x
2. Step 2: Convert to fraction form
   1,289.23/1,933.86 = 672.82/x
3. Step 3: Cross multiply
   1,289.23x = 1,933.86 × 672.82
4. Step 4: Simplify right side
   1,289.23x = 1,301,139.69
5. Step 5: Solve for x
   x = 1,301,139.69/1,289.23
6. Step 6: Final answer
   x = 1,009.24