Finding the Third Proportional to 1,330,390 and 2,918,322

Step by Step Solution

1. Step 1: Write the proportion equation
   1,330,390 : 2,918,322 = 2,918,322 : x
2. Step 2: Convert to fraction form
   1,330,390/2,918,322 = 2,918,322/x
3. Step 3: Cross multiply
   1,330,390x = 2,918,322 × 2,918,322
4. Step 4: Simplify right side
   1,330,390x = 8,516,603,295,684
5. Step 5: Solve for x
   x = 8,516,603,295,684/1,330,390
6. Step 6: Final answer
   x = 6,401,583.97