Finding the Third Proportional to 1,386,590 and 2,130,346

Step by Step Solution

1. Step 1: Write the proportion equation
   1,386,590 : 2,130,346 = 2,130,346 : x
2. Step 2: Convert to fraction form
   1,386,590/2,130,346 = 2,130,346/x
3. Step 3: Cross multiply
   1,386,590x = 2,130,346 × 2,130,346
4. Step 4: Simplify right side
   1,386,590x = 4,538,374,079,716
5. Step 5: Solve for x
   x = 4,538,374,079,716/1,386,590
6. Step 6: Final answer
   x = 3,273,046.88