Finding the Third Proportional to 638,100 and 1,392,108

Step by Step Solution

1. Step 1: Write the proportion equation
   638,100 : 1,392,108 = 1,392,108 : x
2. Step 2: Convert to fraction form
   638,100/1,392,108 = 1,392,108/x
3. Step 3: Cross multiply
   638,100x = 1,392,108 × 1,392,108
4. Step 4: Simplify right side
   638,100x = 1,937,964,683,664
5. Step 5: Solve for x
   x = 1,937,964,683,664/638,100
6. Step 6: Final answer
   x = 3,037,086.17