Finding the Third Proportional to 1,420.88 and 3,318.89

Step by Step Solution

1. Step 1: Write the proportion equation
   1,420.88 : 3,318.89 = 3,318.89 : x
2. Step 2: Convert to fraction form
   1,420.88/3,318.89 = 3,318.89/x
3. Step 3: Cross multiply
   1,420.88x = 3,318.89 × 3,318.89
4. Step 4: Simplify right side
   1,420.88x = 11,015,034.98
5. Step 5: Solve for x
   x = 11,015,034.98/1,420.88
6. Step 6: Final answer
   x = 7,752.29