Finding the Fourth Proportional to 2,312.96, 3,469.46 and 926.42

Step by Step Solution

1. Step 1: Write the proportion equation
   2,312.96 : 3,469.46 = 926.42 : x
2. Step 2: Convert to fraction form
   2,312.96/3,469.46 = 926.42/x
3. Step 3: Cross multiply
   2,312.96x = 3,469.46 × 926.42
4. Step 4: Simplify right side
   2,312.96x = 3,214,155.15
5. Step 5: Solve for x
   x = 3,214,155.15/2,312.96
6. Step 6: Final answer
   x = 1,389.63