Finding the Third Proportional to 155,538 and 418,986

Step by Step Solution

1. Step 1: Write the proportion equation
   155,538 : 418,986 = 418,986 : x
2. Step 2: Convert to fraction form
   155,538/418,986 = 418,986/x
3. Step 3: Cross multiply
   155,538x = 418,986 × 418,986
4. Step 4: Simplify right side
   155,538x = 175,549,268,196
5. Step 5: Solve for x
   x = 175,549,268,196/155,538
6. Step 6: Final answer
   x = 1,128,658.39