Finding the Third Proportional to 140,580 and 215,046

Step by Step Solution

1. Step 1: Write the proportion equation
   140,580 : 215,046 = 215,046 : x
2. Step 2: Convert to fraction form
   140,580/215,046 = 215,046/x
3. Step 3: Cross multiply
   140,580x = 215,046 × 215,046
4. Step 4: Simplify right side
   140,580x = 46,244,782,116
5. Step 5: Solve for x
   x = 46,244,782,116/140,580
6. Step 6: Final answer
   x = 328,957.05