Finding the Fourth Proportional to 9,989.74, 14,929.32 and 9,413.56

Step by Step Solution

1. Step 1: Write the proportion equation
   9,989.74 : 14,929.32 = 9,413.56 : x
2. Step 2: Convert to fraction form
   9,989.74/14,929.32 = 9,413.56/x
3. Step 3: Cross multiply
   9,989.74x = 14,929.32 × 9,413.56
4. Step 4: Simplify right side
   9,989.74x = 140,538,049.58
5. Step 5: Solve for x
   x = 140,538,049.58/9,989.74
6. Step 6: Final answer
   x = 14,068.24