Finding the Fourth Proportional to 9,341.60, 12,892.05 and 5,709.21

Step by Step Solution

1. Step 1: Write the proportion equation
   9,341.60 : 12,892.05 = 5,709.21 : x
2. Step 2: Convert to fraction form
   9,341.60/12,892.05 = 5,709.21/x
3. Step 3: Cross multiply
   9,341.60x = 12,892.05 × 5,709.21
4. Step 4: Simplify right side
   9,341.60x = 73,603,351.03
5. Step 5: Solve for x
   x = 73,603,351.03/9,341.60
6. Step 6: Final answer
   x = 7,879.10