Finding the Fourth Proportional to 12,200.49, 18,300.78 and 2,966.49

Step by Step Solution

1. Step 1: Write the proportion equation
   12,200.49 : 18,300.78 = 2,966.49 : x
2. Step 2: Convert to fraction form
   12,200.49/18,300.78 = 2,966.49/x
3. Step 3: Cross multiply
   12,200.49x = 18,300.78 × 2,966.49
4. Step 4: Simplify right side
   12,200.49x = 54,289,080.86
5. Step 5: Solve for x
   x = 54,289,080.86/12,200.49
6. Step 6: Final answer
   x = 4,449.75