Finding the Third Proportional to 1,388,730 and 2,164,290

Step by Step Solution

1. Step 1: Write the proportion equation
   1,388,730 : 2,164,290 = 2,164,290 : x
2. Step 2: Convert to fraction form
   1,388,730/2,164,290 = 2,164,290/x
3. Step 3: Cross multiply
   1,388,730x = 2,164,290 × 2,164,290
4. Step 4: Simplify right side
   1,388,730x = 4,684,151,204,100
5. Step 5: Solve for x
   x = 4,684,151,204,100/1,388,730
6. Step 6: Final answer
   x = 3,372,974.74