Finding the Fourth Proportional to 12,131.80, 16,740.69 and 6,826.50

Step by Step Solution

1. Step 1: Write the proportion equation
   12,131.80 : 16,740.69 = 6,826.50 : x
2. Step 2: Convert to fraction form
   12,131.80/16,740.69 = 6,826.50/x
3. Step 3: Cross multiply
   12,131.80x = 16,740.69 × 6,826.50
4. Step 4: Simplify right side
   12,131.80x = 114,280,320.29
5. Step 5: Solve for x
   x = 114,280,320.29/12,131.80
6. Step 6: Final answer
   x = 9,419.90