Finding the Fourth Proportional to 22,310.78, 30,786.59 and 13,358.05

Step by Step Solution

1. Step 1: Write the proportion equation
   22,310.78 : 30,786.59 = 13,358.05 : x
2. Step 2: Convert to fraction form
   22,310.78/30,786.59 = 13,358.05/x
3. Step 3: Cross multiply
   22,310.78x = 30,786.59 × 13,358.05
4. Step 4: Simplify right side
   22,310.78x = 411,248,808.55
5. Step 5: Solve for x
   x = 411,248,808.55/22,310.78
6. Step 6: Final answer
   x = 18,432.74