Finding the Fourth Proportional to 2,146.92, 3,217.72 and 913.32

Step by Step Solution

1. Step 1: Write the proportion equation
   2,146.92 : 3,217.72 = 913.32 : x
2. Step 2: Convert to fraction form
   2,146.92/3,217.72 = 913.32/x
3. Step 3: Cross multiply
   2,146.92x = 3,217.72 × 913.32
4. Step 4: Simplify right side
   2,146.92x = 2,938,808.03
5. Step 5: Solve for x
   x = 2,938,808.03/2,146.92
6. Step 6: Final answer
   x = 1,368.85