Finding the Fourth Proportional to 72,607.38, 108,845.46 and 50,431.20

Step by Step Solution

1. Step 1: Write the proportion equation
   72,607.38 : 108,845.46 = 50,431.20 : x
2. Step 2: Convert to fraction form
   72,607.38/108,845.46 = 50,431.20/x
3. Step 3: Cross multiply
   72,607.38x = 108,845.46 × 50,431.20
4. Step 4: Simplify right side
   72,607.38x = 5,489,207,162.35
5. Step 5: Solve for x
   x = 5,489,207,162.35/72,607.38
6. Step 6: Final answer
   x = 75,601.23