Finding the Third Proportional to 442,836 and 687,583.50

Step by Step Solution

1. Step 1: Write the proportion equation
   442,836 : 687,583.50 = 687,583.50 : x
2. Step 2: Convert to fraction form
   442,836/687,583.50 = 687,583.50/x
3. Step 3: Cross multiply
   442,836x = 687,583.50 × 687,583.50
4. Step 4: Simplify right side
   442,836x = 472,771,069,472.25
5. Step 5: Solve for x
   x = 472,771,069,472.25/442,836
6. Step 6: Final answer
   x = 1,067,598.55