Finding the Third Proportional to 868,424 and 1,239,564

Step by Step Solution

1. Step 1: Write the proportion equation
   868,424 : 1,239,564 = 1,239,564 : x
2. Step 2: Convert to fraction form
   868,424/1,239,564 = 1,239,564/x
3. Step 3: Cross multiply
   868,424x = 1,239,564 × 1,239,564
4. Step 4: Simplify right side
   868,424x = 1,536,518,910,096
5. Step 5: Solve for x
   x = 1,536,518,910,096/868,424
6. Step 6: Final answer
   x = 1,769,318.80