Finding the Fourth Proportional to 12,061.35, 18,078.05 and 7,135.14

Step by Step Solution

1. Step 1: Write the proportion equation
   12,061.35 : 18,078.05 = 7,135.14 : x
2. Step 2: Convert to fraction form
   12,061.35/18,078.05 = 7,135.14/x
3. Step 3: Cross multiply
   12,061.35x = 18,078.05 × 7,135.14
4. Step 4: Simplify right side
   12,061.35x = 128,989,382.00
5. Step 5: Solve for x
   x = 128,989,382.00/12,061.35
6. Step 6: Final answer
   x = 10,694.44