Finding the Fourth Proportional to 13,128.86, 18,126.96 and 10,622.09

Step by Step Solution

1. Step 1: Write the proportion equation
   13,128.86 : 18,126.96 = 10,622.09 : x
2. Step 2: Convert to fraction form
   13,128.86/18,126.96 = 10,622.09/x
3. Step 3: Cross multiply
   13,128.86x = 18,126.96 × 10,622.09
4. Step 4: Simplify right side
   13,128.86x = 192,546,200.55
5. Step 5: Solve for x
   x = 192,546,200.55/13,128.86
6. Step 6: Final answer
   x = 14,665.87