Finding the Fourth Proportional to 12,132.18, 18,178.83 and 5,107.86

Step by Step Solution

1. Step 1: Write the proportion equation
   12,132.18 : 18,178.83 = 5,107.86 : x
2. Step 2: Convert to fraction form
   12,132.18/18,178.83 = 5,107.86/x
3. Step 3: Cross multiply
   12,132.18x = 18,178.83 × 5,107.86
4. Step 4: Simplify right side
   12,132.18x = 92,854,918.60
5. Step 5: Solve for x
   x = 92,854,918.60/12,132.18
6. Step 6: Final answer
   x = 7,653.61