Finding the Fourth Proportional to 2,426.47, 3,640.25 and 866.63

Step by Step Solution

1. Step 1: Write the proportion equation
   2,426.47 : 3,640.25 = 866.63 : x
2. Step 2: Convert to fraction form
   2,426.47/3,640.25 = 866.63/x
3. Step 3: Cross multiply
   2,426.47x = 3,640.25 × 866.63
4. Step 4: Simplify right side
   2,426.47x = 3,154,749.86
5. Step 5: Solve for x
   x = 3,154,749.86/2,426.47
6. Step 6: Final answer
   x = 1,300.14