Finding the Fourth Proportional to 1,380.24, 1,903.68 and 938.52

Step by Step Solution

1. Step 1: Write the proportion equation
   1,380.24 : 1,903.68 = 938.52 : x
2. Step 2: Convert to fraction form
   1,380.24/1,903.68 = 938.52/x
3. Step 3: Cross multiply
   1,380.24x = 1,903.68 × 938.52
4. Step 4: Simplify right side
   1,380.24x = 1,786,641.75
5. Step 5: Solve for x
   x = 1,786,641.75/1,380.24
6. Step 6: Final answer
   x = 1,294.44