Finding the Third Proportional to 680,187 and 1,404,438

Step by Step Solution

1. Step 1: Write the proportion equation
   680,187 : 1,404,438 = 1,404,438 : x
2. Step 2: Convert to fraction form
   680,187/1,404,438 = 1,404,438/x
3. Step 3: Cross multiply
   680,187x = 1,404,438 × 1,404,438
4. Step 4: Simplify right side
   680,187x = 1,972,446,095,844
5. Step 5: Solve for x
   x = 1,972,446,095,844/680,187
6. Step 6: Final answer
   x = 2,899,858.56