Finding the Third Proportional to 3,128.63 and 4,224.94

Step by Step Solution

1. Step 1: Write the proportion equation
   3,128.63 : 4,224.94 = 4,224.94 : x
2. Step 2: Convert to fraction form
   3,128.63/4,224.94 = 4,224.94/x
3. Step 3: Cross multiply
   3,128.63x = 4,224.94 × 4,224.94
4. Step 4: Simplify right side
   3,128.63x = 17,850,096.88
5. Step 5: Solve for x
   x = 17,850,096.88/3,128.63
6. Step 6: Final answer
   x = 5,705.41