Finding the Third Proportional to 431,688 and 655,308

Step by Step Solution

1. Step 1: Write the proportion equation
   431,688 : 655,308 = 655,308 : x
2. Step 2: Convert to fraction form
   431,688/655,308 = 655,308/x
3. Step 3: Cross multiply
   431,688x = 655,308 × 655,308
4. Step 4: Simplify right side
   431,688x = 429,428,574,864
5. Step 5: Solve for x
   x = 429,428,574,864/431,688
6. Step 6: Final answer
   x = 994,766.07