Finding the Fourth Proportional to 3,884.69, 5,361.32 and 2,312.79

Step by Step Solution

1. Step 1: Write the proportion equation
   3,884.69 : 5,361.32 = 2,312.79 : x
2. Step 2: Convert to fraction form
   3,884.69/5,361.32 = 2,312.79/x
3. Step 3: Cross multiply
   3,884.69x = 5,361.32 × 2,312.79
4. Step 4: Simplify right side
   3,884.69x = 12,399,607.28
5. Step 5: Solve for x
   x = 12,399,607.28/3,884.69
6. Step 6: Final answer
   x = 3,191.92