Finding the Fourth Proportional to 12,103.17, 18,133.56 and 7,422.05

Step by Step Solution

1. Step 1: Write the proportion equation
   12,103.17 : 18,133.56 = 7,422.05 : x
2. Step 2: Convert to fraction form
   12,103.17/18,133.56 = 7,422.05/x
3. Step 3: Cross multiply
   12,103.17x = 18,133.56 × 7,422.05
4. Step 4: Simplify right side
   12,103.17x = 134,588,098.33
5. Step 5: Solve for x
   x = 134,588,098.33/12,103.17
6. Step 6: Final answer
   x = 11,120.07