Finding the Fourth Proportional to 6,506.24, 8,978.72 and 3,987.36

Step by Step Solution

1. Step 1: Write the proportion equation
   6,506.24 : 8,978.72 = 3,987.36 : x
2. Step 2: Convert to fraction form
   6,506.24/8,978.72 = 3,987.36/x
3. Step 3: Cross multiply
   6,506.24x = 8,978.72 × 3,987.36
4. Step 4: Simplify right side
   6,506.24x = 35,801,388.98
5. Step 5: Solve for x
   x = 35,801,388.98/6,506.24
6. Step 6: Final answer
   x = 5,502.62