Finding the Third Proportional to 191,356 and 418,988

Step by Step Solution

1. Step 1: Write the proportion equation
   191,356 : 418,988 = 418,988 : x
2. Step 2: Convert to fraction form
   191,356/418,988 = 418,988/x
3. Step 3: Cross multiply
   191,356x = 418,988 × 418,988
4. Step 4: Simplify right side
   191,356x = 175,550,944,144
5. Step 5: Solve for x
   x = 175,550,944,144/191,356
6. Step 6: Final answer
   x = 917,404.96