Finding the Fourth Proportional to 22,816.58, 31,468.78 and 13,863.90

Step by Step Solution

1. Step 1: Write the proportion equation
   22,816.58 : 31,468.78 = 13,863.90 : x
2. Step 2: Convert to fraction form
   22,816.58/31,468.78 = 13,863.90/x
3. Step 3: Cross multiply
   22,816.58x = 31,468.78 × 13,863.90
4. Step 4: Simplify right side
   22,816.58x = 436,280,019.04
5. Step 5: Solve for x
   x = 436,280,019.04/22,816.58
6. Step 6: Final answer
   x = 19,121.18