Finding the Fourth Proportional to 1,651.59, 2,279.21 and 905.56

Step by Step Solution

1. Step 1: Write the proportion equation
   1,651.59 : 2,279.21 = 905.56 : x
2. Step 2: Convert to fraction form
   1,651.59/2,279.21 = 905.56/x
3. Step 3: Cross multiply
   1,651.59x = 2,279.21 × 905.56
4. Step 4: Simplify right side
   1,651.59x = 2,063,962.03
5. Step 5: Solve for x
   x = 2,063,962.03/1,651.59
6. Step 6: Final answer
   x = 1,249.68