Finding the Fourth Proportional to 1,380.83, 1,902.57 and 937.96

Step by Step Solution

1. Step 1: Write the proportion equation
   1,380.83 : 1,902.57 = 937.96 : x
2. Step 2: Convert to fraction form
   1,380.83/1,902.57 = 937.96/x
3. Step 3: Cross multiply
   1,380.83x = 1,902.57 × 937.96
4. Step 4: Simplify right side
   1,380.83x = 1,784,542.26
5. Step 5: Solve for x
   x = 1,784,542.26/1,380.83
6. Step 6: Final answer
   x = 1,292.37