Finding the Fourth Proportional to 12,127.86, 18,196.11 and 5,198.58

Step by Step Solution

1. Step 1: Write the proportion equation
   12,127.86 : 18,196.11 = 5,198.58 : x
2. Step 2: Convert to fraction form
   12,127.86/18,196.11 = 5,198.58/x
3. Step 3: Cross multiply
   12,127.86x = 18,196.11 × 5,198.58
4. Step 4: Simplify right side
   12,127.86x = 94,593,933.52
5. Step 5: Solve for x
   x = 94,593,933.52/12,127.86
6. Step 6: Final answer
   x = 7,799.72