Finding the Fourth Proportional to 19,870.72, 29,806.18 and 6,723.20

Step by Step Solution

1. Step 1: Write the proportion equation
   19,870.72 : 29,806.18 = 6,723.20 : x
2. Step 2: Convert to fraction form
   19,870.72/29,806.18 = 6,723.20/x
3. Step 3: Cross multiply
   19,870.72x = 29,806.18 × 6,723.20
4. Step 4: Simplify right side
   19,870.72x = 200,392,967.08
5. Step 5: Solve for x
   x = 200,392,967.08/19,870.72
6. Step 6: Final answer
   x = 10,084.84