Finding the Third Proportional to 367,399.50 and 556,638

Step by Step Solution

1. Step 1: Write the proportion equation
   367,399.50 : 556,638 = 556,638 : x
2. Step 2: Convert to fraction form
   367,399.50/556,638 = 556,638/x
3. Step 3: Cross multiply
   367,399.50x = 556,638 × 556,638
4. Step 4: Simplify right side
   367,399.50x = 309,845,863,044
5. Step 5: Solve for x
   x = 309,845,863,044/367,399.50
6. Step 6: Final answer
   x = 843,348.62