Finding the Third Proportional to 1,390,430 and 2,151,801

Step by Step Solution

1. Step 1: Write the proportion equation
   1,390,430 : 2,151,801 = 2,151,801 : x
2. Step 2: Convert to fraction form
   1,390,430/2,151,801 = 2,151,801/x
3. Step 3: Cross multiply
   1,390,430x = 2,151,801 × 2,151,801
4. Step 4: Simplify right side
   1,390,430x = 4,630,247,543,601
5. Step 5: Solve for x
   x = 4,630,247,543,601/1,390,430
6. Step 6: Final answer
   x = 3,330,083.17