Finding the Third Proportional to 777.50 and 1,710

Step by Step Solution

1. Step 1: Write the proportion equation
   777.50 : 1,710 = 1,710 : x
2. Step 2: Convert to fraction form
   777.50/1,710 = 1,710/x
3. Step 3: Cross multiply
   777.50x = 1,710 × 1,710
4. Step 4: Simplify right side
   777.50x = 2,924,100
5. Step 5: Solve for x
   x = 2,924,100/777.50
6. Step 6: Final answer
   x = 3,760.90