Finding the Fourth Proportional to 9,355.96, 12,910.98 and 5,164.12

Step by Step Solution

1. Step 1: Write the proportion equation
   9,355.96 : 12,910.98 = 5,164.12 : x
2. Step 2: Convert to fraction form
   9,355.96/12,910.98 = 5,164.12/x
3. Step 3: Cross multiply
   9,355.96x = 12,910.98 × 5,164.12
4. Step 4: Simplify right side
   9,355.96x = 66,673,850.04
5. Step 5: Solve for x
   x = 66,673,850.04/9,355.96
6. Step 6: Final answer
   x = 7,126.35