Finding the Third Proportional to 663,213 and 1,421,061

Step by Step Solution

1. Step 1: Write the proportion equation
   663,213 : 1,421,061 = 1,421,061 : x
2. Step 2: Convert to fraction form
   663,213/1,421,061 = 1,421,061/x
3. Step 3: Cross multiply
   663,213x = 1,421,061 × 1,421,061
4. Step 4: Simplify right side
   663,213x = 2,019,414,365,721
5. Step 5: Solve for x
   x = 2,019,414,365,721/663,213
6. Step 6: Final answer
   x = 3,044,895.63