Finding the Third Proportional to 686,926 and 1,488,259

Step by Step Solution

1. Step 1: Write the proportion equation
   686,926 : 1,488,259 = 1,488,259 : x
2. Step 2: Convert to fraction form
   686,926/1,488,259 = 1,488,259/x
3. Step 3: Cross multiply
   686,926x = 1,488,259 × 1,488,259
4. Step 4: Simplify right side
   686,926x = 2,214,914,851,081
5. Step 5: Solve for x
   x = 2,214,914,851,081/686,926
6. Step 6: Final answer
   x = 3,224,386.40