Finding the Fourth Proportional to 72,745.25, 108,584.69 and 67,402.31

Step by Step Solution

1. Step 1: Write the proportion equation
   72,745.25 : 108,584.69 = 67,402.31 : x
2. Step 2: Convert to fraction form
   72,745.25/108,584.69 = 67,402.31/x
3. Step 3: Cross multiply
   72,745.25x = 108,584.69 × 67,402.31
4. Step 4: Simplify right side
   72,745.25x = 7,318,858,056.70
5. Step 5: Solve for x
   x = 7,318,858,056.70/72,745.25
6. Step 6: Final answer
   x = 100,609.44