Finding the Fourth Proportional to 1,405.47, 1,938.45 and 908.16

Step by Step Solution

1. Step 1: Write the proportion equation
   1,405.47 : 1,938.45 = 908.16 : x
2. Step 2: Convert to fraction form
   1,405.47/1,938.45 = 908.16/x
3. Step 3: Cross multiply
   1,405.47x = 1,938.45 × 908.16
4. Step 4: Simplify right side
   1,405.47x = 1,760,422.75
5. Step 5: Solve for x
   x = 1,760,422.75/1,405.47
6. Step 6: Final answer
   x = 1,252.55