Finding the Fourth Proportional to 12,140.29, 18,201.52 and 5,120.02

Step by Step Solution

1. Step 1: Write the proportion equation
   12,140.29 : 18,201.52 = 5,120.02 : x
2. Step 2: Convert to fraction form
   12,140.29/18,201.52 = 5,120.02/x
3. Step 3: Cross multiply
   12,140.29x = 18,201.52 × 5,120.02
4. Step 4: Simplify right side
   12,140.29x = 93,192,146.43
5. Step 5: Solve for x
   x = 93,192,146.43/12,140.29
6. Step 6: Final answer
   x = 7,676.27