Finding the Fourth Proportional to 12,171.88, 18,220.56 and 7,793.56

Step by Step Solution

1. Step 1: Write the proportion equation
   12,171.88 : 18,220.56 = 7,793.56 : x
2. Step 2: Convert to fraction form
   12,171.88/18,220.56 = 7,793.56/x
3. Step 3: Cross multiply
   12,171.88x = 18,220.56 × 7,793.56
4. Step 4: Simplify right side
   12,171.88x = 142,003,027.59
5. Step 5: Solve for x
   x = 142,003,027.59/12,171.88
6. Step 6: Final answer
   x = 11,666.48