Finding the Fourth Proportional to 2,906.36, 4,359.38 and 1,057.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,906.36 : 4,359.38 = 1,057.72 : x
2. Step 2: Convert to fraction form
   2,906.36/4,359.38 = 1,057.72/x
3. Step 3: Cross multiply
   2,906.36x = 4,359.38 × 1,057.72
4. Step 4: Simplify right side
   2,906.36x = 4,611,003.41
5. Step 5: Solve for x
   x = 4,611,003.41/2,906.36
6. Step 6: Final answer
   x = 1,586.52