Finding the Third Proportional to 1,000,478 and 2,190,692

Step by Step Solution

1. Step 1: Write the proportion equation
   1,000,478 : 2,190,692 = 2,190,692 : x
2. Step 2: Convert to fraction form
   1,000,478/2,190,692 = 2,190,692/x
3. Step 3: Cross multiply
   1,000,478x = 2,190,692 × 2,190,692
4. Step 4: Simplify right side
   1,000,478x = 4,799,131,438,864
5. Step 5: Solve for x
   x = 4,799,131,438,864/1,000,478
6. Step 6: Final answer
   x = 4,796,838.55