Finding the Fourth Proportional to 1,392.58, 2,086.34 and 650.82

Step by Step Solution

1. Step 1: Write the proportion equation
   1,392.58 : 2,086.34 = 650.82 : x
2. Step 2: Convert to fraction form
   1,392.58/2,086.34 = 650.82/x
3. Step 3: Cross multiply
   1,392.58x = 2,086.34 × 650.82
4. Step 4: Simplify right side
   1,392.58x = 1,357,831.80
5. Step 5: Solve for x
   x = 1,357,831.80/1,392.58
6. Step 6: Final answer
   x = 975.05