Finding the Third Proportional to 1,440.56 and 3,218.63

Step by Step Solution

1. Step 1: Write the proportion equation
   1,440.56 : 3,218.63 = 3,218.63 : x
2. Step 2: Convert to fraction form
   1,440.56/3,218.63 = 3,218.63/x
3. Step 3: Cross multiply
   1,440.56x = 3,218.63 × 3,218.63
4. Step 4: Simplify right side
   1,440.56x = 10,359,546.89
5. Step 5: Solve for x
   x = 10,359,546.89/1,440.56
6. Step 6: Final answer
   x = 7,191.32