Finding the Fourth Proportional to 1,538.58, 2,122.56 and 908.94

Step by Step Solution

1. Step 1: Write the proportion equation
   1,538.58 : 2,122.56 = 908.94 : x
2. Step 2: Convert to fraction form
   1,538.58/2,122.56 = 908.94/x
3. Step 3: Cross multiply
   1,538.58x = 2,122.56 × 908.94
4. Step 4: Simplify right side
   1,538.58x = 1,929,279.69
5. Step 5: Solve for x
   x = 1,929,279.69/1,538.58
6. Step 6: Final answer
   x = 1,253.94