Finding the Fourth Proportional to 22,436.79, 30,963.78 and 13,488.45

Step by Step Solution

1. Step 1: Write the proportion equation
   22,436.79 : 30,963.78 = 13,488.45 : x
2. Step 2: Convert to fraction form
   22,436.79/30,963.78 = 13,488.45/x
3. Step 3: Cross multiply
   22,436.79x = 30,963.78 × 13,488.45
4. Step 4: Simplify right side
   22,436.79x = 417,653,398.34
5. Step 5: Solve for x
   x = 417,653,398.34/22,436.79
6. Step 6: Final answer
   x = 18,614.67