Finding the Fourth Proportional to 16,783.48, 23,160.30 and 9,331

Step by Step Solution

1. Step 1: Write the proportion equation
   16,783.48 : 23,160.30 = 9,331 : x
2. Step 2: Convert to fraction form
   16,783.48/23,160.30 = 9,331/x
3. Step 3: Cross multiply
   16,783.48x = 23,160.30 × 9,331
4. Step 4: Simplify right side
   16,783.48x = 216,108,759.30
5. Step 5: Solve for x
   x = 216,108,759.30/16,783.48
6. Step 6: Final answer
   x = 12,876.28