Finding the Fourth Proportional to 8,109.12, 12,164.93 and 3,429.14

Step by Step Solution

1. Step 1: Write the proportion equation
   8,109.12 : 12,164.93 = 3,429.14 : x
2. Step 2: Convert to fraction form
   8,109.12/12,164.93 = 3,429.14/x
3. Step 3: Cross multiply
   8,109.12x = 12,164.93 × 3,429.14
4. Step 4: Simplify right side
   8,109.12x = 41,715,170.09
5. Step 5: Solve for x
   x = 41,715,170.09/8,109.12
6. Step 6: Final answer
   x = 5,144.23