Finding the Fourth Proportional to 22,086.93, 30,469.89 and 13,129.34

Step by Step Solution

1. Step 1: Write the proportion equation
   22,086.93 : 30,469.89 = 13,129.34 : x
2. Step 2: Convert to fraction form
   22,086.93/30,469.89 = 13,129.34/x
3. Step 3: Cross multiply
   22,086.93x = 30,469.89 × 13,129.34
4. Step 4: Simplify right side
   22,086.93x = 400,049,393.22
5. Step 5: Solve for x
   x = 400,049,393.22/22,086.93
6. Step 6: Final answer
   x = 18,112.49