Finding the Fourth Proportional to 2,865.61, 4,298.52 and 917.56

Step by Step Solution

1. Step 1: Write the proportion equation
   2,865.61 : 4,298.52 = 917.56 : x
2. Step 2: Convert to fraction form
   2,865.61/4,298.52 = 917.56/x
3. Step 3: Cross multiply
   2,865.61x = 4,298.52 × 917.56
4. Step 4: Simplify right side
   2,865.61x = 3,944,150.01
5. Step 5: Solve for x
   x = 3,944,150.01/2,865.61
6. Step 6: Final answer
   x = 1,376.37