Finding the Fourth Proportional to 12,056.18, 16,643.49 and 9,200.12

Step by Step Solution

1. Step 1: Write the proportion equation
   12,056.18 : 16,643.49 = 9,200.12 : x
2. Step 2: Convert to fraction form
   12,056.18/16,643.49 = 9,200.12/x
3. Step 3: Cross multiply
   12,056.18x = 16,643.49 × 9,200.12
4. Step 4: Simplify right side
   12,056.18x = 153,122,105.22
5. Step 5: Solve for x
   x = 153,122,105.22/12,056.18
6. Step 6: Final answer
   x = 12,700.71