Finding the Fourth Proportional to 16,213.51, 22,375.27 and 9,139.78

Step by Step Solution

1. Step 1: Write the proportion equation
   16,213.51 : 22,375.27 = 9,139.78 : x
2. Step 2: Convert to fraction form
   16,213.51/22,375.27 = 9,139.78/x
3. Step 3: Cross multiply
   16,213.51x = 22,375.27 × 9,139.78
4. Step 4: Simplify right side
   16,213.51x = 204,505,084.63
5. Step 5: Solve for x
   x = 204,505,084.63/16,213.51
6. Step 6: Final answer
   x = 12,613.25