Finding the Fourth Proportional to 1,651.82, 2,279.52 and 905.78

Step by Step Solution

1. Step 1: Write the proportion equation
   1,651.82 : 2,279.52 = 905.78 : x
2. Step 2: Convert to fraction form
   1,651.82/2,279.52 = 905.78/x
3. Step 3: Cross multiply
   1,651.82x = 2,279.52 × 905.78
4. Step 4: Simplify right side
   1,651.82x = 2,064,743.63
5. Step 5: Solve for x
   x = 2,064,743.63/1,651.82
6. Step 6: Final answer
   x = 1,249.98