Finding the Third Proportional to 638,106 and 1,392,126

Step by Step Solution

1. Step 1: Write the proportion equation
   638,106 : 1,392,126 = 1,392,126 : x
2. Step 2: Convert to fraction form
   638,106/1,392,126 = 1,392,126/x
3. Step 3: Cross multiply
   638,106x = 1,392,126 × 1,392,126
4. Step 4: Simplify right side
   638,106x = 1,938,014,799,876
5. Step 5: Solve for x
   x = 1,938,014,799,876/638,106
6. Step 6: Final answer
   x = 3,037,136.15