Finding the Fourth Proportional to 22,663.35, 31,270.59 and 13,709.07

Step by Step Solution

1. Step 1: Write the proportion equation
   22,663.35 : 31,270.59 = 13,709.07 : x
2. Step 2: Convert to fraction form
   22,663.35/31,270.59 = 13,709.07/x
3. Step 3: Cross multiply
   22,663.35x = 31,270.59 × 13,709.07
4. Step 4: Simplify right side
   22,663.35x = 428,690,707.25
5. Step 5: Solve for x
   x = 428,690,707.25/22,663.35
6. Step 6: Final answer
   x = 18,915.59