Finding the Fourth Proportional to 67,683.42, 101,371.50 and 54,309.78

Step by Step Solution

1. Step 1: Write the proportion equation
   67,683.42 : 101,371.50 = 54,309.78 : x
2. Step 2: Convert to fraction form
   67,683.42/101,371.50 = 54,309.78/x
3. Step 3: Cross multiply
   67,683.42x = 101,371.50 × 54,309.78
4. Step 4: Simplify right side
   67,683.42x = 5,505,463,863.27
5. Step 5: Solve for x
   x = 5,505,463,863.27/67,683.42
6. Step 6: Final answer
   x = 81,341.40