Finding the Third Proportional to 144,201 and 215,106.75

Step by Step Solution

1. Step 1: Write the proportion equation
   144,201 : 215,106.75 = 215,106.75 : x
2. Step 2: Convert to fraction form
   144,201/215,106.75 = 215,106.75/x
3. Step 3: Cross multiply
   144,201x = 215,106.75 × 215,106.75
4. Step 4: Simplify right side
   144,201x = 46,270,913,895.56
5. Step 5: Solve for x
   x = 46,270,913,895.56/144,201
6. Step 6: Final answer
   x = 320,877.90