Finding the Fourth Proportional to 2,651.94, 3,979.73 and 920.56

Step by Step Solution

1. Step 1: Write the proportion equation
   2,651.94 : 3,979.73 = 920.56 : x
2. Step 2: Convert to fraction form
   2,651.94/3,979.73 = 920.56/x
3. Step 3: Cross multiply
   2,651.94x = 3,979.73 × 920.56
4. Step 4: Simplify right side
   2,651.94x = 3,663,592.50
5. Step 5: Solve for x
   x = 3,663,592.50/2,651.94
6. Step 6: Final answer
   x = 1,381.48