Finding the Third Proportional to 947.50 and 1,688

Step by Step Solution

1. Step 1: Write the proportion equation
   947.50 : 1,688 = 1,688 : x
2. Step 2: Convert to fraction form
   947.50/1,688 = 1,688/x
3. Step 3: Cross multiply
   947.50x = 1,688 × 1,688
4. Step 4: Simplify right side
   947.50x = 2,849,344
5. Step 5: Solve for x
   x = 2,849,344/947.50
6. Step 6: Final answer
   x = 3,007.22