Finding the Fourth Proportional to 16,693.18, 23,035.78 and 9,139.38

Step by Step Solution

1. Step 1: Write the proportion equation
   16,693.18 : 23,035.78 = 9,139.38 : x
2. Step 2: Convert to fraction form
   16,693.18/23,035.78 = 9,139.38/x
3. Step 3: Cross multiply
   16,693.18x = 23,035.78 × 9,139.38
4. Step 4: Simplify right side
   16,693.18x = 210,532,747.02
5. Step 5: Solve for x
   x = 210,532,747.02/16,693.18
6. Step 6: Final answer
   x = 12,611.90