Finding the Fourth Proportional to 22,547.34, 31,119.12 and 13,121.37

Step by Step Solution

1. Step 1: Write the proportion equation
   22,547.34 : 31,119.12 = 13,121.37 : x
2. Step 2: Convert to fraction form
   22,547.34/31,119.12 = 13,121.37/x
3. Step 3: Cross multiply
   22,547.34x = 31,119.12 × 13,121.37
4. Step 4: Simplify right side
   22,547.34x = 408,325,487.59
5. Step 5: Solve for x
   x = 408,325,487.59/22,547.34
6. Step 6: Final answer
   x = 18,109.70