Finding the Fourth Proportional to 21,047.42, 31,576.35 and 6,256.31

Step by Step Solution

1. Step 1: Write the proportion equation
   21,047.42 : 31,576.35 = 6,256.31 : x
2. Step 2: Convert to fraction form
   21,047.42/31,576.35 = 6,256.31/x
3. Step 3: Cross multiply
   21,047.42x = 31,576.35 × 6,256.31
4. Step 4: Simplify right side
   21,047.42x = 197,551,434.27
5. Step 5: Solve for x
   x = 197,551,434.27/21,047.42
6. Step 6: Final answer
   x = 9,386.02