Finding the Fourth Proportional to 3,987.86, 5,953.30 and 3,960.32

Step by Step Solution

1. Step 1: Write the proportion equation
   3,987.86 : 5,953.30 = 3,960.32 : x
2. Step 2: Convert to fraction form
   3,987.86/5,953.30 = 3,960.32/x
3. Step 3: Cross multiply
   3,987.86x = 5,953.30 × 3,960.32
4. Step 4: Simplify right side
   3,987.86x = 23,576,973.06
5. Step 5: Solve for x
   x = 23,576,973.06/3,987.86
6. Step 6: Final answer
   x = 5,912.19