Finding the Fourth Proportional to 2,645.55, 3,967.25 and 913.95

Step by Step Solution

1. Step 1: Write the proportion equation
   2,645.55 : 3,967.25 = 913.95 : x
2. Step 2: Convert to fraction form
   2,645.55/3,967.25 = 913.95/x
3. Step 3: Cross multiply
   2,645.55x = 3,967.25 × 913.95
4. Step 4: Simplify right side
   2,645.55x = 3,625,863.57
5. Step 5: Solve for x
   x = 3,625,863.57/2,645.55
6. Step 6: Final answer
   x = 1,370.55