Finding the Third Proportional to 143,188 and 309,974

Step by Step Solution

1. Step 1: Write the proportion equation
   143,188 : 309,974 = 309,974 : x
2. Step 2: Convert to fraction form
   143,188/309,974 = 309,974/x
3. Step 3: Cross multiply
   143,188x = 309,974 × 309,974
4. Step 4: Simplify right side
   143,188x = 96,083,880,676
5. Step 5: Solve for x
   x = 96,083,880,676/143,188
6. Step 6: Final answer
   x = 671,033.05