Finding the Third Proportional to 688,178 and 1,619,336

Step by Step Solution

1. Step 1: Write the proportion equation
   688,178 : 1,619,336 = 1,619,336 : x
2. Step 2: Convert to fraction form
   688,178/1,619,336 = 1,619,336/x
3. Step 3: Cross multiply
   688,178x = 1,619,336 × 1,619,336
4. Step 4: Simplify right side
   688,178x = 2,622,249,080,896
5. Step 5: Solve for x
   x = 2,622,249,080,896/688,178
6. Step 6: Final answer
   x = 3,810,422.71