Finding the Fourth Proportional to 15,021.31, 20,731.98 and 8,737.33

Step by Step Solution

1. Step 1: Write the proportion equation
   15,021.31 : 20,731.98 = 8,737.33 : x
2. Step 2: Convert to fraction form
   15,021.31/20,731.98 = 8,737.33/x
3. Step 3: Cross multiply
   15,021.31x = 20,731.98 × 8,737.33
4. Step 4: Simplify right side
   15,021.31x = 181,142,150.81
5. Step 5: Solve for x
   x = 181,142,150.81/15,021.31
6. Step 6: Final answer
   x = 12,059.01