Finding the Fourth Proportional to 12,123, 16,727.80 and 7,342.12

Step by Step Solution

1. Step 1: Write the proportion equation
   12,123 : 16,727.80 = 7,342.12 : x
2. Step 2: Convert to fraction form
   12,123/16,727.80 = 7,342.12/x
3. Step 3: Cross multiply
   12,123x = 16,727.80 × 7,342.12
4. Step 4: Simplify right side
   12,123x = 122,817,514.94
5. Step 5: Solve for x
   x = 122,817,514.94/12,123
6. Step 6: Final answer
   x = 10,130.95