Finding the Fourth Proportional to 14,613.78, 21,926.43 and 5,380.50

Step by Step Solution

1. Step 1: Write the proportion equation
   14,613.78 : 21,926.43 = 5,380.50 : x
2. Step 2: Convert to fraction form
   14,613.78/21,926.43 = 5,380.50/x
3. Step 3: Cross multiply
   14,613.78x = 21,926.43 × 5,380.50
4. Step 4: Simplify right side
   14,613.78x = 117,975,156.62
5. Step 5: Solve for x
   x = 117,975,156.62/14,613.78
6. Step 6: Final answer
   x = 8,072.87