Finding the Fourth Proportional to 880.72, 1,323.47 and 830.37

Step by Step Solution

1. Step 1: Write the proportion equation
   880.72 : 1,323.47 = 830.37 : x
2. Step 2: Convert to fraction form
   880.72/1,323.47 = 830.37/x
3. Step 3: Cross multiply
   880.72x = 1,323.47 × 830.37
4. Step 4: Simplify right side
   880.72x = 1,098,976.82
5. Step 5: Solve for x
   x = 1,098,976.82/880.72
6. Step 6: Final answer
   x = 1,247.82