Finding the Fourth Proportional to 9,413.34, 12,990.58 and 5,164.62

Step by Step Solution

1. Step 1: Write the proportion equation
   9,413.34 : 12,990.58 = 5,164.62 : x
2. Step 2: Convert to fraction form
   9,413.34/12,990.58 = 5,164.62/x
3. Step 3: Cross multiply
   9,413.34x = 12,990.58 × 5,164.62
4. Step 4: Simplify right side
   9,413.34x = 67,091,331.42
5. Step 5: Solve for x
   x = 67,091,331.42/9,413.34
6. Step 6: Final answer
   x = 7,127.26