Finding the Fourth Proportional to 1,322.10, 1,978.56 and 908.46

Step by Step Solution

1. Step 1: Write the proportion equation
   1,322.10 : 1,978.56 = 908.46 : x
2. Step 2: Convert to fraction form
   1,322.10/1,978.56 = 908.46/x
3. Step 3: Cross multiply
   1,322.10x = 1,978.56 × 908.46
4. Step 4: Simplify right side
   1,322.10x = 1,797,442.62
5. Step 5: Solve for x
   x = 1,797,442.62/1,322.10
6. Step 6: Final answer
   x = 1,359.54