Finding the Fourth Proportional to 1,773.80, 2,661.53 and 908.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,773.80 : 2,661.53 = 908.72 : x
2. Step 2: Convert to fraction form
   1,773.80/2,661.53 = 908.72/x
3. Step 3: Cross multiply
   1,773.80x = 2,661.53 × 908.72
4. Step 4: Simplify right side
   1,773.80x = 2,418,567.69
5. Step 5: Solve for x
   x = 2,418,567.69/1,773.80
6. Step 6: Final answer
   x = 1,363.50