Finding the Third Proportional to 143,429 and 315,166

Step by Step Solution

1. Step 1: Write the proportion equation
   143,429 : 315,166 = 315,166 : x
2. Step 2: Convert to fraction form
   143,429/315,166 = 315,166/x
3. Step 3: Cross multiply
   143,429x = 315,166 × 315,166
4. Step 4: Simplify right side
   143,429x = 99,329,607,556
5. Step 5: Solve for x
   x = 99,329,607,556/143,429
6. Step 6: Final answer
   x = 692,535.04