Finding the Fourth Proportional to 2,756.16, 4,133.37 and 906.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,756.16 : 4,133.37 = 906.78 : x
2. Step 2: Convert to fraction form
   2,756.16/4,133.37 = 906.78/x
3. Step 3: Cross multiply
   2,756.16x = 4,133.37 × 906.78
4. Step 4: Simplify right side
   2,756.16x = 3,748,057.25
5. Step 5: Solve for x
   x = 3,748,057.25/2,756.16
6. Step 6: Final answer
   x = 1,359.88