Finding the Fourth Proportional to 12,123.18, 16,727.48 and 7,086.43

Step by Step Solution

1. Step 1: Write the proportion equation
   12,123.18 : 16,727.48 = 7,086.43 : x
2. Step 2: Convert to fraction form
   12,123.18/16,727.48 = 7,086.43/x
3. Step 3: Cross multiply
   12,123.18x = 16,727.48 × 7,086.43
4. Step 4: Simplify right side
   12,123.18x = 118,538,051.94
5. Step 5: Solve for x
   x = 118,538,051.94/12,123.18
6. Step 6: Final answer
   x = 9,777.80