Finding the Fourth Proportional to 11,860.62, 17,784.89 and 3,960.29

Step by Step Solution

1. Step 1: Write the proportion equation
   11,860.62 : 17,784.89 = 3,960.29 : x
2. Step 2: Convert to fraction form
   11,860.62/17,784.89 = 3,960.29/x
3. Step 3: Cross multiply
   11,860.62x = 17,784.89 × 3,960.29
4. Step 4: Simplify right side
   11,860.62x = 70,433,361.53
5. Step 5: Solve for x
   x = 70,433,361.53/11,860.62
6. Step 6: Final answer
   x = 5,938.42