Finding the Fourth Proportional to 8,109.48, 12,159.54 and 3,112.32

Step by Step Solution

1. Step 1: Write the proportion equation
   8,109.48 : 12,159.54 = 3,112.32 : x
2. Step 2: Convert to fraction form
   8,109.48/12,159.54 = 3,112.32/x
3. Step 3: Cross multiply
   8,109.48x = 12,159.54 × 3,112.32
4. Step 4: Simplify right side
   8,109.48x = 37,844,379.53
5. Step 5: Solve for x
   x = 37,844,379.53/8,109.48
6. Step 6: Final answer
   x = 4,666.68