Finding the Fourth Proportional to 16,419.42, 22,658.58 and 9,345.96

Step by Step Solution

1. Step 1: Write the proportion equation
   16,419.42 : 22,658.58 = 9,345.96 : x
2. Step 2: Convert to fraction form
   16,419.42/22,658.58 = 9,345.96/x
3. Step 3: Cross multiply
   16,419.42x = 22,658.58 × 9,345.96
4. Step 4: Simplify right side
   16,419.42x = 211,766,182.34
5. Step 5: Solve for x
   x = 211,766,182.34/16,419.42
6. Step 6: Final answer
   x = 12,897.30