Finding the Third Proportional to 1,390,879 and 2,931,201

Step by Step Solution

1. Step 1: Write the proportion equation
   1,390,879 : 2,931,201 = 2,931,201 : x
2. Step 2: Convert to fraction form
   1,390,879/2,931,201 = 2,931,201/x
3. Step 3: Cross multiply
   1,390,879x = 2,931,201 × 2,931,201
4. Step 4: Simplify right side
   1,390,879x = 8,591,939,302,401
5. Step 5: Solve for x
   x = 8,591,939,302,401/1,390,879
6. Step 6: Final answer
   x = 6,177,344.90