Finding the Third Proportional to 143,928 and 215,908

Step by Step Solution

1. Step 1: Write the proportion equation
   143,928 : 215,908 = 215,908 : x
2. Step 2: Convert to fraction form
   143,928/215,908 = 215,908/x
3. Step 3: Cross multiply
   143,928x = 215,908 × 215,908
4. Step 4: Simplify right side
   143,928x = 46,616,264,464
5. Step 5: Solve for x
   x = 46,616,264,464/143,928
6. Step 6: Final answer
   x = 323,886.00