Finding the Third Proportional to 638,835 and 1,296,441

Step by Step Solution

1. Step 1: Write the proportion equation
   638,835 : 1,296,441 = 1,296,441 : x
2. Step 2: Convert to fraction form
   638,835/1,296,441 = 1,296,441/x
3. Step 3: Cross multiply
   638,835x = 1,296,441 × 1,296,441
4. Step 4: Simplify right side
   638,835x = 1,680,759,266,481
5. Step 5: Solve for x
   x = 1,680,759,266,481/638,835
6. Step 6: Final answer
   x = 2,630,975.55