Finding the Fourth Proportional to 22,621.92, 31,218.28 and 13,192.31

Step by Step Solution

1. Step 1: Write the proportion equation
   22,621.92 : 31,218.28 = 13,192.31 : x
2. Step 2: Convert to fraction form
   22,621.92/31,218.28 = 13,192.31/x
3. Step 3: Cross multiply
   22,621.92x = 31,218.28 × 13,192.31
4. Step 4: Simplify right side
   22,621.92x = 411,841,096.89
5. Step 5: Solve for x
   x = 411,841,096.89/22,621.92
6. Step 6: Final answer
   x = 18,205.40