Finding the Third Proportional to 1,090.50 and 1,658.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,090.50 : 1,658.50 = 1,658.50 : x
2. Step 2: Convert to fraction form
   1,090.50/1,658.50 = 1,658.50/x
3. Step 3: Cross multiply
   1,090.50x = 1,658.50 × 1,658.50
4. Step 4: Simplify right side
   1,090.50x = 2,750,622.25
5. Step 5: Solve for x
   x = 2,750,622.25/1,090.50
6. Step 6: Final answer
   x = 2,522.35