Finding the Third Proportional to 863,963 and 1,216,119

Step by Step Solution

1. Step 1: Write the proportion equation
   863,963 : 1,216,119 = 1,216,119 : x
2. Step 2: Convert to fraction form
   863,963/1,216,119 = 1,216,119/x
3. Step 3: Cross multiply
   863,963x = 1,216,119 × 1,216,119
4. Step 4: Simplify right side
   863,963x = 1,478,945,422,161
5. Step 5: Solve for x
   x = 1,478,945,422,161/863,963
6. Step 6: Final answer
   x = 1,711,815.69