Finding the Third Proportional to 990.56 and 1,513.69

Step by Step Solution

1. Step 1: Write the proportion equation
   990.56 : 1,513.69 = 1,513.69 : x
2. Step 2: Convert to fraction form
   990.56/1,513.69 = 1,513.69/x
3. Step 3: Cross multiply
   990.56x = 1,513.69 × 1,513.69
4. Step 4: Simplify right side
   990.56x = 2,291,249.85
5. Step 5: Solve for x
   x = 2,291,249.85/990.56
6. Step 6: Final answer
   x = 2,313.08