Finding the Fourth Proportional to 2,146.71, 3,217.33 and 913.79

Step by Step Solution

1. Step 1: Write the proportion equation
   2,146.71 : 3,217.33 = 913.79 : x
2. Step 2: Convert to fraction form
   2,146.71/3,217.33 = 913.79/x
3. Step 3: Cross multiply
   2,146.71x = 3,217.33 × 913.79
4. Step 4: Simplify right side
   2,146.71x = 2,939,943.33
5. Step 5: Solve for x
   x = 2,939,943.33/2,146.71
6. Step 6: Final answer
   x = 1,369.51