Finding the Fourth Proportional to 16,911.72, 23,338.67 and 9,359.01

Step by Step Solution

1. Step 1: Write the proportion equation
   16,911.72 : 23,338.67 = 9,359.01 : x
2. Step 2: Convert to fraction form
   16,911.72/23,338.67 = 9,359.01/x
3. Step 3: Cross multiply
   16,911.72x = 23,338.67 × 9,359.01
4. Step 4: Simplify right side
   16,911.72x = 218,426,799.12
5. Step 5: Solve for x
   x = 218,426,799.12/16,911.72
6. Step 6: Final answer
   x = 12,915.71