Finding the Fourth Proportional to 21,009.38, 31,520.34 and 8,527.01

Step by Step Solution

1. Step 1: Write the proportion equation
   21,009.38 : 31,520.34 = 8,527.01 : x
2. Step 2: Convert to fraction form
   21,009.38/31,520.34 = 8,527.01/x
3. Step 3: Cross multiply
   21,009.38x = 31,520.34 × 8,527.01
4. Step 4: Simplify right side
   21,009.38x = 268,774,096.78
5. Step 5: Solve for x
   x = 268,774,096.78/21,009.38
6. Step 6: Final answer
   x = 12,793.06