Finding the Fourth Proportional to 2,784.87, 4,177.72 and 910.17

Step by Step Solution

1. Step 1: Write the proportion equation
   2,784.87 : 4,177.72 = 910.17 : x
2. Step 2: Convert to fraction form
   2,784.87/4,177.72 = 910.17/x
3. Step 3: Cross multiply
   2,784.87x = 4,177.72 × 910.17
4. Step 4: Simplify right side
   2,784.87x = 3,802,435.41
5. Step 5: Solve for x
   x = 3,802,435.41/2,784.87
6. Step 6: Final answer
   x = 1,365.39