Finding the Fourth Proportional to 22,426.77, 30,948.78 and 13,479.21

Step by Step Solution

1. Step 1: Write the proportion equation
   22,426.77 : 30,948.78 = 13,479.21 : x
2. Step 2: Convert to fraction form
   22,426.77/30,948.78 = 13,479.21/x
3. Step 3: Cross multiply
   22,426.77x = 30,948.78 × 13,479.21
4. Step 4: Simplify right side
   22,426.77x = 417,165,155.41
5. Step 5: Solve for x
   x = 417,165,155.41/22,426.77
6. Step 6: Final answer
   x = 18,601.21