Finding the Fourth Proportional to 22,709.72, 31,342.16 and 13,757

Step by Step Solution

1. Step 1: Write the proportion equation
   22,709.72 : 31,342.16 = 13,757 : x
2. Step 2: Convert to fraction form
   22,709.72/31,342.16 = 13,757/x
3. Step 3: Cross multiply
   22,709.72x = 31,342.16 × 13,757
4. Step 4: Simplify right side
   22,709.72x = 431,174,095.12
5. Step 5: Solve for x
   x = 431,174,095.12/22,709.72
6. Step 6: Final answer
   x = 18,986.32