Finding the Fourth Proportional to 21,823.86, 30,107.79 and 13,435.50

Step by Step Solution

1. Step 1: Write the proportion equation
   21,823.86 : 30,107.79 = 13,435.50 : x
2. Step 2: Convert to fraction form
   21,823.86/30,107.79 = 13,435.50/x
3. Step 3: Cross multiply
   21,823.86x = 30,107.79 × 13,435.50
4. Step 4: Simplify right side
   21,823.86x = 404,513,212.55
5. Step 5: Solve for x
   x = 404,513,212.55/21,823.86
6. Step 6: Final answer
   x = 18,535.37