Finding the Fourth Proportional to 18,465.42, 27,695.82 and 5,139.42

Step by Step Solution

1. Step 1: Write the proportion equation
   18,465.42 : 27,695.82 = 5,139.42 : x
2. Step 2: Convert to fraction form
   18,465.42/27,695.82 = 5,139.42/x
3. Step 3: Cross multiply
   18,465.42x = 27,695.82 × 5,139.42
4. Step 4: Simplify right side
   18,465.42x = 142,340,470.50
5. Step 5: Solve for x
   x = 142,340,470.50/18,465.42
6. Step 6: Final answer
   x = 7,708.49