Finding the Third Proportional to 661.47 and 1,445.94

Step by Step Solution

1. Step 1: Write the proportion equation
   661.47 : 1,445.94 = 1,445.94 : x
2. Step 2: Convert to fraction form
   661.47/1,445.94 = 1,445.94/x
3. Step 3: Cross multiply
   661.47x = 1,445.94 × 1,445.94
4. Step 4: Simplify right side
   661.47x = 2,090,735.25
5. Step 5: Solve for x
   x = 2,090,735.25/661.47
6. Step 6: Final answer
   x = 3,160.75