Finding the Fourth Proportional to 9,419.37, 12,998.78 and 5,170.61

Step by Step Solution

1. Step 1: Write the proportion equation
   9,419.37 : 12,998.78 = 5,170.61 : x
2. Step 2: Convert to fraction form
   9,419.37/12,998.78 = 5,170.61/x
3. Step 3: Cross multiply
   9,419.37x = 12,998.78 × 5,170.61
4. Step 4: Simplify right side
   9,419.37x = 67,211,611.33
5. Step 5: Solve for x
   x = 67,211,611.33/9,419.37
6. Step 6: Final answer
   x = 7,135.47