Finding the Fourth Proportional to 16,420.38, 22,662.90 and 9,345.84

Step by Step Solution

1. Step 1: Write the proportion equation
   16,420.38 : 22,662.90 = 9,345.84 : x
2. Step 2: Convert to fraction form
   16,420.38/22,662.90 = 9,345.84/x
3. Step 3: Cross multiply
   16,420.38x = 22,662.90 × 9,345.84
4. Step 4: Simplify right side
   16,420.38x = 211,803,837.34
5. Step 5: Solve for x
   x = 211,803,837.34/16,420.38
6. Step 6: Final answer
   x = 12,898.84