Finding the Fourth Proportional to 9,413.30, 12,989.90 and 5,435.69

Step by Step Solution

1. Step 1: Write the proportion equation
   9,413.30 : 12,989.90 = 5,435.69 : x
2. Step 2: Convert to fraction form
   9,413.30/12,989.90 = 5,435.69/x
3. Step 3: Cross multiply
   9,413.30x = 12,989.90 × 5,435.69
4. Step 4: Simplify right side
   9,413.30x = 70,609,018.17
5. Step 5: Solve for x
   x = 70,609,018.17/9,413.30
6. Step 6: Final answer
   x = 7,500.98