Finding the Third Proportional to 817,684 and 1,218,534

Step by Step Solution

1. Step 1: Write the proportion equation
   817,684 : 1,218,534 = 1,218,534 : x
2. Step 2: Convert to fraction form
   817,684/1,218,534 = 1,218,534/x
3. Step 3: Cross multiply
   817,684x = 1,218,534 × 1,218,534
4. Step 4: Simplify right side
   817,684x = 1,484,825,109,156
5. Step 5: Solve for x
   x = 1,484,825,109,156/817,684
6. Step 6: Final answer
   x = 1,815,891.11