Finding the Third Proportional to 688,898 and 1,086,172

Step by Step Solution

1. Step 1: Write the proportion equation
   688,898 : 1,086,172 = 1,086,172 : x
2. Step 2: Convert to fraction form
   688,898/1,086,172 = 1,086,172/x
3. Step 3: Cross multiply
   688,898x = 1,086,172 × 1,086,172
4. Step 4: Simplify right side
   688,898x = 1,179,769,613,584
5. Step 5: Solve for x
   x = 1,179,769,613,584/688,898
6. Step 6: Final answer
   x = 1,712,546.14