Finding the Fourth Proportional to 1,651.58, 2,279.15 and 905.55

Step by Step Solution

1. Step 1: Write the proportion equation
   1,651.58 : 2,279.15 = 905.55 : x
2. Step 2: Convert to fraction form
   1,651.58/2,279.15 = 905.55/x
3. Step 3: Cross multiply
   1,651.58x = 2,279.15 × 905.55
4. Step 4: Simplify right side
   1,651.58x = 2,063,872.89
5. Step 5: Solve for x
   x = 2,063,872.89/1,651.58
6. Step 6: Final answer
   x = 1,249.64