Finding the Third Proportional to 1,512.28 and 3,316.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,512.28 : 3,316.72 = 3,316.72 : x
2. Step 2: Convert to fraction form
   1,512.28/3,316.72 = 3,316.72/x
3. Step 3: Cross multiply
   1,512.28x = 3,316.72 × 3,316.72
4. Step 4: Simplify right side
   1,512.28x = 11,000,622.46
5. Step 5: Solve for x
   x = 11,000,622.46/1,512.28
6. Step 6: Final answer
   x = 7,274.18