Finding the Third Proportional to 921,144 and 2,171,364

Step by Step Solution

1. Step 1: Write the proportion equation
   921,144 : 2,171,364 = 2,171,364 : x
2. Step 2: Convert to fraction form
   921,144/2,171,364 = 2,171,364/x
3. Step 3: Cross multiply
   921,144x = 2,171,364 × 2,171,364
4. Step 4: Simplify right side
   921,144x = 4,714,821,620,496
5. Step 5: Solve for x
   x = 4,714,821,620,496/921,144
6. Step 6: Final answer
   x = 5,118,441.44