Finding the Third Proportional to 554,582 and 856,328.50

Step by Step Solution

1. Step 1: Write the proportion equation
   554,582 : 856,328.50 = 856,328.50 : x
2. Step 2: Convert to fraction form
   554,582/856,328.50 = 856,328.50/x
3. Step 3: Cross multiply
   554,582x = 856,328.50 × 856,328.50
4. Step 4: Simplify right side
   554,582x = 733,298,499,912.25
5. Step 5: Solve for x
   x = 733,298,499,912.25/554,582
6. Step 6: Final answer
   x = 1,322,254.42