Finding the Third Proportional to 663,580 and 1,007,658

Step by Step Solution

1. Step 1: Write the proportion equation
   663,580 : 1,007,658 = 1,007,658 : x
2. Step 2: Convert to fraction form
   663,580/1,007,658 = 1,007,658/x
3. Step 3: Cross multiply
   663,580x = 1,007,658 × 1,007,658
4. Step 4: Simplify right side
   663,580x = 1,015,374,644,964
5. Step 5: Solve for x
   x = 1,015,374,644,964/663,580
6. Step 6: Final answer
   x = 1,530,146.55