Finding the Fourth Proportional to 72,428.50, 108,564.72 and 30,297.70

Step by Step Solution

1. Step 1: Write the proportion equation
   72,428.50 : 108,564.72 = 30,297.70 : x
2. Step 2: Convert to fraction form
   72,428.50/108,564.72 = 30,297.70/x
3. Step 3: Cross multiply
   72,428.50x = 108,564.72 × 30,297.70
4. Step 4: Simplify right side
   72,428.50x = 3,289,261,317.14
5. Step 5: Solve for x
   x = 3,289,261,317.14/72,428.50
6. Step 6: Final answer
   x = 45,413.91