Finding the Third Proportional to 431,346 and 907,308

Step by Step Solution

1. Step 1: Write the proportion equation
   431,346 : 907,308 = 907,308 : x
2. Step 2: Convert to fraction form
   431,346/907,308 = 907,308/x
3. Step 3: Cross multiply
   431,346x = 907,308 × 907,308
4. Step 4: Simplify right side
   431,346x = 823,207,806,864
5. Step 5: Solve for x
   x = 823,207,806,864/431,346
6. Step 6: Final answer
   x = 1,908,462.83