Finding the Fourth Proportional to 2,562.86, 3,846.13 and 920.79

Step by Step Solution

1. Step 1: Write the proportion equation
   2,562.86 : 3,846.13 = 920.79 : x
2. Step 2: Convert to fraction form
   2,562.86/3,846.13 = 920.79/x
3. Step 3: Cross multiply
   2,562.86x = 3,846.13 × 920.79
4. Step 4: Simplify right side
   2,562.86x = 3,541,475.74
5. Step 5: Solve for x
   x = 3,541,475.74/2,562.86
6. Step 6: Final answer
   x = 1,381.84