Finding the Fourth Proportional to 2,644.63, 3,967.55 and 913.25

Step by Step Solution

1. Step 1: Write the proportion equation
   2,644.63 : 3,967.55 = 913.25 : x
2. Step 2: Convert to fraction form
   2,644.63/3,967.55 = 913.25/x
3. Step 3: Cross multiply
   2,644.63x = 3,967.55 × 913.25
4. Step 4: Simplify right side
   2,644.63x = 3,623,365.04
5. Step 5: Solve for x
   x = 3,623,365.04/2,644.63
6. Step 6: Final answer
   x = 1,370.08