Finding the Third Proportional to 414,538 and 860,240

Step by Step Solution

1. Step 1: Write the proportion equation
   414,538 : 860,240 = 860,240 : x
2. Step 2: Convert to fraction form
   414,538/860,240 = 860,240/x
3. Step 3: Cross multiply
   414,538x = 860,240 × 860,240
4. Step 4: Simplify right side
   414,538x = 740,012,857,600
5. Step 5: Solve for x
   x = 740,012,857,600/414,538
6. Step 6: Final answer
   x = 1,785,150.84