Finding the Fourth Proportional to 8,390.18, 12,608.33 and 7,841.59

Step by Step Solution

1. Step 1: Write the proportion equation
   8,390.18 : 12,608.33 = 7,841.59 : x
2. Step 2: Convert to fraction form
   8,390.18/12,608.33 = 7,841.59/x
3. Step 3: Cross multiply
   8,390.18x = 12,608.33 × 7,841.59
4. Step 4: Simplify right side
   8,390.18x = 98,869,399.61
5. Step 5: Solve for x
   x = 98,869,399.61/8,390.18
6. Step 6: Final answer
   x = 11,783.94