Finding the Fourth Proportional to 22,780.78, 31,436.71 and 13,349.14

Step by Step Solution

1. Step 1: Write the proportion equation
   22,780.78 : 31,436.71 = 13,349.14 : x
2. Step 2: Convert to fraction form
   22,780.78/31,436.71 = 13,349.14/x
3. Step 3: Cross multiply
   22,780.78x = 31,436.71 × 13,349.14
4. Step 4: Simplify right side
   22,780.78x = 419,653,042.93
5. Step 5: Solve for x
   x = 419,653,042.93/22,780.78
6. Step 6: Final answer
   x = 18,421.36