Finding the Fourth Proportional to 11,148.35, 16,724.72 and 4,128.43

Step by Step Solution

1. Step 1: Write the proportion equation
   11,148.35 : 16,724.72 = 4,128.43 : x
2. Step 2: Convert to fraction form
   11,148.35/16,724.72 = 4,128.43/x
3. Step 3: Cross multiply
   11,148.35x = 16,724.72 × 4,128.43
4. Step 4: Simplify right side
   11,148.35x = 69,046,835.79
5. Step 5: Solve for x
   x = 69,046,835.79/11,148.35
6. Step 6: Final answer
   x = 6,193.46