Finding the Fourth Proportional to 1,238.83, 1,709.52 and 679.25

Step by Step Solution

1. Step 1: Write the proportion equation
   1,238.83 : 1,709.52 = 679.25 : x
2. Step 2: Convert to fraction form
   1,238.83/1,709.52 = 679.25/x
3. Step 3: Cross multiply
   1,238.83x = 1,709.52 × 679.25
4. Step 4: Simplify right side
   1,238.83x = 1,161,191.46
5. Step 5: Solve for x
   x = 1,161,191.46/1,238.83
6. Step 6: Final answer
   x = 937.33