Finding the Fourth Proportional to 67,321.67, 100,786.89 and 39,155.81

Step by Step Solution

1. Step 1: Write the proportion equation
   67,321.67 : 100,786.89 = 39,155.81 : x
2. Step 2: Convert to fraction form
   67,321.67/100,786.89 = 39,155.81/x
3. Step 3: Cross multiply
   67,321.67x = 100,786.89 × 39,155.81
4. Step 4: Simplify right side
   67,321.67x = 3,946,392,315.33
5. Step 5: Solve for x
   x = 3,946,392,315.33/67,321.67
6. Step 6: Final answer
   x = 58,619.94