Finding the Fourth Proportional to 16,494.72, 22,762.88 and 9,420.16

Step by Step Solution

1. Step 1: Write the proportion equation
   16,494.72 : 22,762.88 = 9,420.16 : x
2. Step 2: Convert to fraction form
   16,494.72/22,762.88 = 9,420.16/x
3. Step 3: Cross multiply
   16,494.72x = 22,762.88 × 9,420.16
4. Step 4: Simplify right side
   16,494.72x = 214,429,971.66
5. Step 5: Solve for x
   x = 214,429,971.66/16,494.72
6. Step 6: Final answer
   x = 12,999.92