Finding the Fourth Proportional to 12,359.95, 18,544.77 and 5,429.59

Step by Step Solution

1. Step 1: Write the proportion equation
   12,359.95 : 18,544.77 = 5,429.59 : x
2. Step 2: Convert to fraction form
   12,359.95/18,544.77 = 5,429.59/x
3. Step 3: Cross multiply
   12,359.95x = 18,544.77 × 5,429.59
4. Step 4: Simplify right side
   12,359.95x = 100,690,451.38
5. Step 5: Solve for x
   x = 100,690,451.38/12,359.95
6. Step 6: Final answer
   x = 8,146.51