Finding the Fourth Proportional to 2,760.19, 4,139.27 and 910.76

Step by Step Solution

1. Step 1: Write the proportion equation
   2,760.19 : 4,139.27 = 910.76 : x
2. Step 2: Convert to fraction form
   2,760.19/4,139.27 = 910.76/x
3. Step 3: Cross multiply
   2,760.19x = 4,139.27 × 910.76
4. Step 4: Simplify right side
   2,760.19x = 3,769,859.71
5. Step 5: Solve for x
   x = 3,769,859.71/2,760.19
6. Step 6: Final answer
   x = 1,365.80