Finding the Third Proportional to 143,969 and 215,854

Step by Step Solution

1. Step 1: Write the proportion equation
   143,969 : 215,854 = 215,854 : x
2. Step 2: Convert to fraction form
   143,969/215,854 = 215,854/x
3. Step 3: Cross multiply
   143,969x = 215,854 × 215,854
4. Step 4: Simplify right side
   143,969x = 46,592,949,316
5. Step 5: Solve for x
   x = 46,592,949,316/143,969
6. Step 6: Final answer
   x = 323,631.82