Finding the Third Proportional to 860,400 and 1,336,620

Step by Step Solution

1. Step 1: Write the proportion equation
   860,400 : 1,336,620 = 1,336,620 : x
2. Step 2: Convert to fraction form
   860,400/1,336,620 = 1,336,620/x
3. Step 3: Cross multiply
   860,400x = 1,336,620 × 1,336,620
4. Step 4: Simplify right side
   860,400x = 1,786,553,024,400
5. Step 5: Solve for x
   x = 1,786,553,024,400/860,400
6. Step 6: Final answer
   x = 2,076,421.46