Finding the Fourth Proportional to 6,642.24, 9,967.56 and 3,870.12

Step by Step Solution

1. Step 1: Write the proportion equation
   6,642.24 : 9,967.56 = 3,870.12 : x
2. Step 2: Convert to fraction form
   6,642.24/9,967.56 = 3,870.12/x
3. Step 3: Cross multiply
   6,642.24x = 9,967.56 × 3,870.12
4. Step 4: Simplify right side
   6,642.24x = 38,575,653.31
5. Step 5: Solve for x
   x = 38,575,653.31/6,642.24
6. Step 6: Final answer
   x = 5,807.63