Finding the Fourth Proportional to 1,538.47, 2,123.04 and 908.92

Step by Step Solution

1. Step 1: Write the proportion equation
   1,538.47 : 2,123.04 = 908.92 : x
2. Step 2: Convert to fraction form
   1,538.47/2,123.04 = 908.92/x
3. Step 3: Cross multiply
   1,538.47x = 2,123.04 × 908.92
4. Step 4: Simplify right side
   1,538.47x = 1,929,673.52
5. Step 5: Solve for x
   x = 1,929,673.52/1,538.47
6. Step 6: Final answer
   x = 1,254.28