Finding the Fourth Proportional to 1,456.80, 2,185.92 and 969.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,456.80 : 2,185.92 = 969.72 : x
2. Step 2: Convert to fraction form
   1,456.80/2,185.92 = 969.72/x
3. Step 3: Cross multiply
   1,456.80x = 2,185.92 × 969.72
4. Step 4: Simplify right side
   1,456.80x = 2,119,730.34
5. Step 5: Solve for x
   x = 2,119,730.34/1,456.80
6. Step 6: Final answer
   x = 1,455.06