Finding the Third Proportional to 554,565 and 828,151.50

Step by Step Solution

1. Step 1: Write the proportion equation
   554,565 : 828,151.50 = 828,151.50 : x
2. Step 2: Convert to fraction form
   554,565/828,151.50 = 828,151.50/x
3. Step 3: Cross multiply
   554,565x = 828,151.50 × 828,151.50
4. Step 4: Simplify right side
   554,565x = 685,834,906,952.25
5. Step 5: Solve for x
   x = 685,834,906,952.25/554,565
6. Step 6: Final answer
   x = 1,236,707.88