Finding the Third Proportional to 1,989,768 and 4,263,391

Step by Step Solution

1. Step 1: Write the proportion equation
   1,989,768 : 4,263,391 = 4,263,391 : x
2. Step 2: Convert to fraction form
   1,989,768/4,263,391 = 4,263,391/x
3. Step 3: Cross multiply
   1,989,768x = 4,263,391 × 4,263,391
4. Step 4: Simplify right side
   1,989,768x = 18,176,502,818,881
5. Step 5: Solve for x
   x = 18,176,502,818,881/1,989,768
6. Step 6: Final answer
   x = 9,134,986.00