Finding the Fourth Proportional to 12,172.42, 16,798.16 and 7,140.27

Step by Step Solution

1. Step 1: Write the proportion equation
   12,172.42 : 16,798.16 = 7,140.27 : x
2. Step 2: Convert to fraction form
   12,172.42/16,798.16 = 7,140.27/x
3. Step 3: Cross multiply
   12,172.42x = 16,798.16 × 7,140.27
4. Step 4: Simplify right side
   12,172.42x = 119,943,397.90
5. Step 5: Solve for x
   x = 119,943,397.90/12,172.42
6. Step 6: Final answer
   x = 9,853.70