Finding the Third Proportional to 155,488.50 and 418,863

Step by Step Solution

1. Step 1: Write the proportion equation
   155,488.50 : 418,863 = 418,863 : x
2. Step 2: Convert to fraction form
   155,488.50/418,863 = 418,863/x
3. Step 3: Cross multiply
   155,488.50x = 418,863 × 418,863
4. Step 4: Simplify right side
   155,488.50x = 175,446,212,769
5. Step 5: Solve for x
   x = 175,446,212,769/155,488.50
6. Step 6: Final answer
   x = 1,128,354.91