Finding the Fourth Proportional to 20,002.49, 30,005.46 and 5,211.42

Step by Step Solution

1. Step 1: Write the proportion equation
   20,002.49 : 30,005.46 = 5,211.42 : x
2. Step 2: Convert to fraction form
   20,002.49/30,005.46 = 5,211.42/x
3. Step 3: Cross multiply
   20,002.49x = 30,005.46 × 5,211.42
4. Step 4: Simplify right side
   20,002.49x = 156,371,054.35
5. Step 5: Solve for x
   x = 156,371,054.35/20,002.49
6. Step 6: Final answer
   x = 7,817.58