Finding the Third Proportional to 688,190 and 1,619,364

Step by Step Solution

1. Step 1: Write the proportion equation
   688,190 : 1,619,364 = 1,619,364 : x
2. Step 2: Convert to fraction form
   688,190/1,619,364 = 1,619,364/x
3. Step 3: Cross multiply
   688,190x = 1,619,364 × 1,619,364
4. Step 4: Simplify right side
   688,190x = 2,622,339,764,496
5. Step 5: Solve for x
   x = 2,622,339,764,496/688,190
6. Step 6: Final answer
   x = 3,810,488.04