Finding the Third Proportional to 520.75 and 1,090

Step by Step Solution

1. Step 1: Write the proportion equation
   520.75 : 1,090 = 1,090 : x
2. Step 2: Convert to fraction form
   520.75/1,090 = 1,090/x
3. Step 3: Cross multiply
   520.75x = 1,090 × 1,090
4. Step 4: Simplify right side
   520.75x = 1,188,100
5. Step 5: Solve for x
   x = 1,188,100/520.75
6. Step 6: Final answer
   x = 2,281.52