Finding the Third Proportional to 638,630 and 1,064,339

Step by Step Solution

1. Step 1: Write the proportion equation
   638,630 : 1,064,339 = 1,064,339 : x
2. Step 2: Convert to fraction form
   638,630/1,064,339 = 1,064,339/x
3. Step 3: Cross multiply
   638,630x = 1,064,339 × 1,064,339
4. Step 4: Simplify right side
   638,630x = 1,132,817,506,921
5. Step 5: Solve for x
   x = 1,132,817,506,921/638,630
6. Step 6: Final answer
   x = 1,773,824.45