Finding the Fourth Proportional to 3,728.48, 5,145.88 and 2,312.42

Step by Step Solution

1. Step 1: Write the proportion equation
   3,728.48 : 5,145.88 = 2,312.42 : x
2. Step 2: Convert to fraction form
   3,728.48/5,145.88 = 2,312.42/x
3. Step 3: Cross multiply
   3,728.48x = 5,145.88 × 2,312.42
4. Step 4: Simplify right side
   3,728.48x = 11,899,435.83
5. Step 5: Solve for x
   x = 11,899,435.83/3,728.48
6. Step 6: Final answer
   x = 3,191.50