Finding the Third Proportional to 326,091 and 428,808

Step by Step Solution

1. Step 1: Write the proportion equation
   326,091 : 428,808 = 428,808 : x
2. Step 2: Convert to fraction form
   326,091/428,808 = 428,808/x
3. Step 3: Cross multiply
   326,091x = 428,808 × 428,808
4. Step 4: Simplify right side
   326,091x = 183,876,300,864
5. Step 5: Solve for x
   x = 183,876,300,864/326,091
6. Step 6: Final answer
   x = 563,880.33