Finding the Third Proportional to 429,243.50 and 847,678

Step by Step Solution

1. Step 1: Write the proportion equation
   429,243.50 : 847,678 = 847,678 : x
2. Step 2: Convert to fraction form
   429,243.50/847,678 = 847,678/x
3. Step 3: Cross multiply
   429,243.50x = 847,678 × 847,678
4. Step 4: Simplify right side
   429,243.50x = 718,557,991,684
5. Step 5: Solve for x
   x = 718,557,991,684/429,243.50
6. Step 6: Final answer
   x = 1,674,010.19