Finding the Third Proportional to 1,638,190 and 2,564,236

Step by Step Solution

1. Step 1: Write the proportion equation
   1,638,190 : 2,564,236 = 2,564,236 : x
2. Step 2: Convert to fraction form
   1,638,190/2,564,236 = 2,564,236/x
3. Step 3: Cross multiply
   1,638,190x = 2,564,236 × 2,564,236
4. Step 4: Simplify right side
   1,638,190x = 6,575,306,263,696
5. Step 5: Solve for x
   x = 6,575,306,263,696/1,638,190
6. Step 6: Final answer
   x = 4,013,762.91