Finding the Third Proportional to 890,960 and 1,287,288

Step by Step Solution

1. Step 1: Write the proportion equation
   890,960 : 1,287,288 = 1,287,288 : x
2. Step 2: Convert to fraction form
   890,960/1,287,288 = 1,287,288/x
3. Step 3: Cross multiply
   890,960x = 1,287,288 × 1,287,288
4. Step 4: Simplify right side
   890,960x = 1,657,110,394,944
5. Step 5: Solve for x
   x = 1,657,110,394,944/890,960
6. Step 6: Final answer
   x = 1,859,915.59