Finding the Fourth Proportional to 4,128.72, 6,191.49 and 1,662.69

Step by Step Solution

1. Step 1: Write the proportion equation
   4,128.72 : 6,191.49 = 1,662.69 : x
2. Step 2: Convert to fraction form
   4,128.72/6,191.49 = 1,662.69/x
3. Step 3: Cross multiply
   4,128.72x = 6,191.49 × 1,662.69
4. Step 4: Simplify right side
   4,128.72x = 10,294,528.51
5. Step 5: Solve for x
   x = 10,294,528.51/4,128.72
6. Step 6: Final answer
   x = 2,493.39