Finding the Fourth Proportional to 2,906.86, 4,360.69 and 1,057.76

Step by Step Solution

1. Step 1: Write the proportion equation
   2,906.86 : 4,360.69 = 1,057.76 : x
2. Step 2: Convert to fraction form
   2,906.86/4,360.69 = 1,057.76/x
3. Step 3: Cross multiply
   2,906.86x = 4,360.69 × 1,057.76
4. Step 4: Simplify right side
   2,906.86x = 4,612,563.45
5. Step 5: Solve for x
   x = 4,612,563.45/2,906.86
6. Step 6: Final answer
   x = 1,586.79