Finding the Fourth Proportional to 1,380.53, 1,902.25 and 937.67

Step by Step Solution

1. Step 1: Write the proportion equation
   1,380.53 : 1,902.25 = 937.67 : x
2. Step 2: Convert to fraction form
   1,380.53/1,902.25 = 937.67/x
3. Step 3: Cross multiply
   1,380.53x = 1,902.25 × 937.67
4. Step 4: Simplify right side
   1,380.53x = 1,783,674.42
5. Step 5: Solve for x
   x = 1,783,674.42/1,380.53
6. Step 6: Final answer
   x = 1,292.02