Finding the Fourth Proportional to 31,309, 43,206.42 and 18,068.68

Step by Step Solution

1. Step 1: Write the proportion equation
   31,309 : 43,206.42 = 18,068.68 : x
2. Step 2: Convert to fraction form
   31,309/43,206.42 = 18,068.68/x
3. Step 3: Cross multiply
   31,309x = 43,206.42 × 18,068.68
4. Step 4: Simplify right side
   31,309x = 780,682,976.93
5. Step 5: Solve for x
   x = 780,682,976.93/31,309
6. Step 6: Final answer
   x = 24,934.78