Finding the Third Proportional to 790 and 1,105.50

Step by Step Solution

1. Step 1: Write the proportion equation
   790 : 1,105.50 = 1,105.50 : x
2. Step 2: Convert to fraction form
   790/1,105.50 = 1,105.50/x
3. Step 3: Cross multiply
   790x = 1,105.50 × 1,105.50
4. Step 4: Simplify right side
   790x = 1,222,130.25
5. Step 5: Solve for x
   x = 1,222,130.25/790
6. Step 6: Final answer
   x = 1,547.00