Finding the Third Proportional to 143,184 and 311,856

Step by Step Solution

1. Step 1: Write the proportion equation
   143,184 : 311,856 = 311,856 : x
2. Step 2: Convert to fraction form
   143,184/311,856 = 311,856/x
3. Step 3: Cross multiply
   143,184x = 311,856 × 311,856
4. Step 4: Simplify right side
   143,184x = 97,254,164,736
5. Step 5: Solve for x
   x = 97,254,164,736/143,184
6. Step 6: Final answer
   x = 679,225.09