Finding the Fourth Proportional to 1,404.90, 1,939.50 and 908.22

Step by Step Solution

1. Step 1: Write the proportion equation
   1,404.90 : 1,939.50 = 908.22 : x
2. Step 2: Convert to fraction form
   1,404.90/1,939.50 = 908.22/x
3. Step 3: Cross multiply
   1,404.90x = 1,939.50 × 908.22
4. Step 4: Simplify right side
   1,404.90x = 1,761,492.69
5. Step 5: Solve for x
   x = 1,761,492.69/1,404.90
6. Step 6: Final answer
   x = 1,253.82