Finding the Fourth Proportional to 9,413.06, 12,991.05 and 5,435.42

Step by Step Solution

1. Step 1: Write the proportion equation
   9,413.06 : 12,991.05 = 5,435.42 : x
2. Step 2: Convert to fraction form
   9,413.06/12,991.05 = 5,435.42/x
3. Step 3: Cross multiply
   9,413.06x = 12,991.05 × 5,435.42
4. Step 4: Simplify right side
   9,413.06x = 70,611,748.04
5. Step 5: Solve for x
   x = 70,611,748.04/9,413.06
6. Step 6: Final answer
   x = 7,501.47