Finding the Fourth Proportional to 1,102.72, 1,521.89 and 683.35

Step by Step Solution

1. Step 1: Write the proportion equation
   1,102.72 : 1,521.89 = 683.35 : x
2. Step 2: Convert to fraction form
   1,102.72/1,521.89 = 683.35/x
3. Step 3: Cross multiply
   1,102.72x = 1,521.89 × 683.35
4. Step 4: Simplify right side
   1,102.72x = 1,039,983.53
5. Step 5: Solve for x
   x = 1,039,983.53/1,102.72
6. Step 6: Final answer
   x = 943.11