Finding the Third Proportional to 143,558 and 213,938

Step by Step Solution

1. Step 1: Write the proportion equation
   143,558 : 213,938 = 213,938 : x
2. Step 2: Convert to fraction form
   143,558/213,938 = 213,938/x
3. Step 3: Cross multiply
   143,558x = 213,938 × 213,938
4. Step 4: Simplify right side
   143,558x = 45,769,467,844
5. Step 5: Solve for x
   x = 45,769,467,844/143,558
6. Step 6: Final answer
   x = 318,822.13