Finding the Third Proportional to 155,494.50 and 418,878

Step by Step Solution

1. Step 1: Write the proportion equation
   155,494.50 : 418,878 = 418,878 : x
2. Step 2: Convert to fraction form
   155,494.50/418,878 = 418,878/x
3. Step 3: Cross multiply
   155,494.50x = 418,878 × 418,878
4. Step 4: Simplify right side
   155,494.50x = 175,458,778,884
5. Step 5: Solve for x
   x = 175,458,778,884/155,494.50
6. Step 6: Final answer
   x = 1,128,392.19