Finding the Third Proportional to 890,680 and 1,379,706

Step by Step Solution

1. Step 1: Write the proportion equation
   890,680 : 1,379,706 = 1,379,706 : x
2. Step 2: Convert to fraction form
   890,680/1,379,706 = 1,379,706/x
3. Step 3: Cross multiply
   890,680x = 1,379,706 × 1,379,706
4. Step 4: Simplify right side
   890,680x = 1,903,588,646,436
5. Step 5: Solve for x
   x = 1,903,588,646,436/890,680
6. Step 6: Final answer
   x = 2,137,230.71