Finding the Third Proportional to 1,000,470 and 2,190,678

Step by Step Solution

1. Step 1: Write the proportion equation
   1,000,470 : 2,190,678 = 2,190,678 : x
2. Step 2: Convert to fraction form
   1,000,470/2,190,678 = 2,190,678/x
3. Step 3: Cross multiply
   1,000,470x = 2,190,678 × 2,190,678
4. Step 4: Simplify right side
   1,000,470x = 4,799,070,099,684
5. Step 5: Solve for x
   x = 4,799,070,099,684/1,000,470
6. Step 6: Final answer
   x = 4,796,815.60