Finding the Third Proportional to 1,368,974 and 2,128,132

Step by Step Solution

1. Step 1: Write the proportion equation
   1,368,974 : 2,128,132 = 2,128,132 : x
2. Step 2: Convert to fraction form
   1,368,974/2,128,132 = 2,128,132/x
3. Step 3: Cross multiply
   1,368,974x = 2,128,132 × 2,128,132
4. Step 4: Simplify right side
   1,368,974x = 4,528,945,809,424
5. Step 5: Solve for x
   x = 4,528,945,809,424/1,368,974
6. Step 6: Final answer
   x = 3,308,277.45