Finding the Fourth Proportional to 14,128.29, 21,191.81 and 4,267.27

Step by Step Solution

1. Step 1: Write the proportion equation
   14,128.29 : 21,191.81 = 4,267.27 : x
2. Step 2: Convert to fraction form
   14,128.29/21,191.81 = 4,267.27/x
3. Step 3: Cross multiply
   14,128.29x = 21,191.81 × 4,267.27
4. Step 4: Simplify right side
   14,128.29x = 90,431,085.01
5. Step 5: Solve for x
   x = 90,431,085.01/14,128.29
6. Step 6: Final answer
   x = 6,400.71