Finding the Third Proportional to 686,905 and 1,488,217

Step by Step Solution

1. Step 1: Write the proportion equation
   686,905 : 1,488,217 = 1,488,217 : x
2. Step 2: Convert to fraction form
   686,905/1,488,217 = 1,488,217/x
3. Step 3: Cross multiply
   686,905x = 1,488,217 × 1,488,217
4. Step 4: Simplify right side
   686,905x = 2,214,789,839,089
5. Step 5: Solve for x
   x = 2,214,789,839,089/686,905
6. Step 6: Final answer
   x = 3,224,302.98