Finding the Third Proportional to 858,293 and 1,298,484

Step by Step Solution

1. Step 1: Write the proportion equation
   858,293 : 1,298,484 = 1,298,484 : x
2. Step 2: Convert to fraction form
   858,293/1,298,484 = 1,298,484/x
3. Step 3: Cross multiply
   858,293x = 1,298,484 × 1,298,484
4. Step 4: Simplify right side
   858,293x = 1,686,060,698,256
5. Step 5: Solve for x
   x = 1,686,060,698,256/858,293
6. Step 6: Final answer
   x = 1,964,434.87