Finding the Fourth Proportional to 2,760.01, 4,139.12 and 910.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,760.01 : 4,139.12 = 910.78 : x
2. Step 2: Convert to fraction form
   2,760.01/4,139.12 = 910.78/x
3. Step 3: Cross multiply
   2,760.01x = 4,139.12 × 910.78
4. Step 4: Simplify right side
   2,760.01x = 3,769,827.71
5. Step 5: Solve for x
   x = 3,769,827.71/2,760.01
6. Step 6: Final answer
   x = 1,365.87