Finding the Fourth Proportional to 20,419.49, 30,619.82 and 6,375.31

Step by Step Solution

1. Step 1: Write the proportion equation
   20,419.49 : 30,619.82 = 6,375.31 : x
2. Step 2: Convert to fraction form
   20,419.49/30,619.82 = 6,375.31/x
3. Step 3: Cross multiply
   20,419.49x = 30,619.82 × 6,375.31
4. Step 4: Simplify right side
   20,419.49x = 195,210,784.03
5. Step 5: Solve for x
   x = 195,210,784.03/20,419.49
6. Step 6: Final answer
   x = 9,560.02