Finding the Third Proportional to 431,230 and 907,144

Step by Step Solution

1. Step 1: Write the proportion equation
   431,230 : 907,144 = 907,144 : x
2. Step 2: Convert to fraction form
   431,230/907,144 = 907,144/x
3. Step 3: Cross multiply
   431,230x = 907,144 × 907,144
4. Step 4: Simplify right side
   431,230x = 822,910,236,736
5. Step 5: Solve for x
   x = 822,910,236,736/431,230
6. Step 6: Final answer
   x = 1,908,286.15