Finding the Fourth Proportional to 20,304.74, 30,456.42 and 7,156.76

Step by Step Solution

1. Step 1: Write the proportion equation
   20,304.74 : 30,456.42 = 7,156.76 : x
2. Step 2: Convert to fraction form
   20,304.74/30,456.42 = 7,156.76/x
3. Step 3: Cross multiply
   20,304.74x = 30,456.42 × 7,156.76
4. Step 4: Simplify right side
   20,304.74x = 217,969,288.40
5. Step 5: Solve for x
   x = 217,969,288.40/20,304.74
6. Step 6: Final answer
   x = 10,734.90