Finding the Fourth Proportional to 16,761.53, 23,131.54 and 9,208.72

Step by Step Solution

1. Step 1: Write the proportion equation
   16,761.53 : 23,131.54 = 9,208.72 : x
2. Step 2: Convert to fraction form
   16,761.53/23,131.54 = 9,208.72/x
3. Step 3: Cross multiply
   16,761.53x = 23,131.54 × 9,208.72
4. Step 4: Simplify right side
   16,761.53x = 213,011,915.45
5. Step 5: Solve for x
   x = 213,011,915.45/16,761.53
6. Step 6: Final answer
   x = 12,708.38