Finding the Third Proportional to 890,588 and 1,812,280

Step by Step Solution

1. Step 1: Write the proportion equation
   890,588 : 1,812,280 = 1,812,280 : x
2. Step 2: Convert to fraction form
   890,588/1,812,280 = 1,812,280/x
3. Step 3: Cross multiply
   890,588x = 1,812,280 × 1,812,280
4. Step 4: Simplify right side
   890,588x = 3,284,358,798,400
5. Step 5: Solve for x
   x = 3,284,358,798,400/890,588
6. Step 6: Final answer
   x = 3,687,854.31