Finding the Fourth Proportional to 20,576.72, 30,870.56 and 8,898.16

Step by Step Solution

1. Step 1: Write the proportion equation
   20,576.72 : 30,870.56 = 8,898.16 : x
2. Step 2: Convert to fraction form
   20,576.72/30,870.56 = 8,898.16/x
3. Step 3: Cross multiply
   20,576.72x = 30,870.56 × 8,898.16
4. Step 4: Simplify right side
   20,576.72x = 274,691,182.17
5. Step 5: Solve for x
   x = 274,691,182.17/20,576.72
6. Step 6: Final answer
   x = 13,349.61