Finding the Fourth Proportional to 16,495.31, 22,763.57 and 9,421.72

Step by Step Solution

1. Step 1: Write the proportion equation
   16,495.31 : 22,763.57 = 9,421.72 : x
2. Step 2: Convert to fraction form
   16,495.31/22,763.57 = 9,421.72/x
3. Step 3: Cross multiply
   16,495.31x = 22,763.57 × 9,421.72
4. Step 4: Simplify right side
   16,495.31x = 214,471,878.72
5. Step 5: Solve for x
   x = 214,471,878.72/16,495.31
6. Step 6: Final answer
   x = 13,001.99