Finding the Third Proportional to 137,862 and 287,388

Step by Step Solution

1. Step 1: Write the proportion equation
   137,862 : 287,388 = 287,388 : x
2. Step 2: Convert to fraction form
   137,862/287,388 = 287,388/x
3. Step 3: Cross multiply
   137,862x = 287,388 × 287,388
4. Step 4: Simplify right side
   137,862x = 82,591,862,544
5. Step 5: Solve for x
   x = 82,591,862,544/137,862
6. Step 6: Final answer
   x = 599,090.85