Finding the Fourth Proportional to 1,219.72, 1,683.24 and 695.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,219.72 : 1,683.24 = 695.72 : x
2. Step 2: Convert to fraction form
   1,219.72/1,683.24 = 695.72/x
3. Step 3: Cross multiply
   1,219.72x = 1,683.24 × 695.72
4. Step 4: Simplify right side
   1,219.72x = 1,171,063.73
5. Step 5: Solve for x
   x = 1,171,063.73/1,219.72
6. Step 6: Final answer
   x = 960.11