Finding the Fourth Proportional to 14,150.69, 21,226.09 and 4,290.05

Step by Step Solution

1. Step 1: Write the proportion equation
   14,150.69 : 21,226.09 = 4,290.05 : x
2. Step 2: Convert to fraction form
   14,150.69/21,226.09 = 4,290.05/x
3. Step 3: Cross multiply
   14,150.69x = 21,226.09 × 4,290.05
4. Step 4: Simplify right side
   14,150.69x = 91,061,001.91
5. Step 5: Solve for x
   x = 91,061,001.91/14,150.69
6. Step 6: Final answer
   x = 6,435.09