Finding the Fourth Proportional to 21,017.62, 31,523.59 and 6,228.10

Step by Step Solution

1. Step 1: Write the proportion equation
   21,017.62 : 31,523.59 = 6,228.10 : x
2. Step 2: Convert to fraction form
   21,017.62/31,523.59 = 6,228.10/x
3. Step 3: Cross multiply
   21,017.62x = 31,523.59 × 6,228.10
4. Step 4: Simplify right side
   21,017.62x = 196,332,070.88
5. Step 5: Solve for x
   x = 196,332,070.88/21,017.62
6. Step 6: Final answer
   x = 9,341.31