Finding the Third Proportional to 686,932 and 1,488,209

Step by Step Solution

1. Step 1: Write the proportion equation
   686,932 : 1,488,209 = 1,488,209 : x
2. Step 2: Convert to fraction form
   686,932/1,488,209 = 1,488,209/x
3. Step 3: Cross multiply
   686,932x = 1,488,209 × 1,488,209
4. Step 4: Simplify right side
   686,932x = 2,214,766,027,681
5. Step 5: Solve for x
   x = 2,214,766,027,681/686,932
6. Step 6: Final answer
   x = 3,224,141.59