Finding the Fourth Proportional to 1,380.52, 1,904.34 and 908.44

Step by Step Solution

1. Step 1: Write the proportion equation
   1,380.52 : 1,904.34 = 908.44 : x
2. Step 2: Convert to fraction form
   1,380.52/1,904.34 = 908.44/x
3. Step 3: Cross multiply
   1,380.52x = 1,904.34 × 908.44
4. Step 4: Simplify right side
   1,380.52x = 1,729,978.63
5. Step 5: Solve for x
   x = 1,729,978.63/1,380.52
6. Step 6: Final answer
   x = 1,253.14