Finding the Fourth Proportional to 21,025.31, 31,546.38 and 8,546.29

Step by Step Solution

1. Step 1: Write the proportion equation
   21,025.31 : 31,546.38 = 8,546.29 : x
2. Step 2: Convert to fraction form
   21,025.31/31,546.38 = 8,546.29/x
3. Step 3: Cross multiply
   21,025.31x = 31,546.38 × 8,546.29
4. Step 4: Simplify right side
   21,025.31x = 269,604,511.93
5. Step 5: Solve for x
   x = 269,604,511.93/21,025.31
6. Step 6: Final answer
   x = 12,822.86