Finding the Fourth Proportional to 1,380.24, 1,902.86 and 937.37

Step by Step Solution

1. Step 1: Write the proportion equation
   1,380.24 : 1,902.86 = 937.37 : x
2. Step 2: Convert to fraction form
   1,380.24/1,902.86 = 937.37/x
3. Step 3: Cross multiply
   1,380.24x = 1,902.86 × 937.37
4. Step 4: Simplify right side
   1,380.24x = 1,783,683.88
5. Step 5: Solve for x
   x = 1,783,683.88/1,380.24
6. Step 6: Final answer
   x = 1,292.30