Finding the Fourth Proportional to 1,219.59, 1,683.18 and 695.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,219.59 : 1,683.18 = 695.72 : x
2. Step 2: Convert to fraction form
   1,219.59/1,683.18 = 695.72/x
3. Step 3: Cross multiply
   1,219.59x = 1,683.18 × 695.72
4. Step 4: Simplify right side
   1,219.59x = 1,171,026.20
5. Step 5: Solve for x
   x = 1,171,026.20/1,219.59
6. Step 6: Final answer
   x = 960.18