Finding the Fourth Proportional to 31,192.92, 43,062.30 and 21,771

Step by Step Solution

1. Step 1: Write the proportion equation
   31,192.92 : 43,062.30 = 21,771 : x
2. Step 2: Convert to fraction form
   31,192.92/43,062.30 = 21,771/x
3. Step 3: Cross multiply
   31,192.92x = 43,062.30 × 21,771
4. Step 4: Simplify right side
   31,192.92x = 937,509,333.30
5. Step 5: Solve for x
   x = 937,509,333.30/31,192.92
6. Step 6: Final answer
   x = 30,055.20