Finding the Third Proportional to 140,130 and 215,379

Step by Step Solution

1. Step 1: Write the proportion equation
   140,130 : 215,379 = 215,379 : x
2. Step 2: Convert to fraction form
   140,130/215,379 = 215,379/x
3. Step 3: Cross multiply
   140,130x = 215,379 × 215,379
4. Step 4: Simplify right side
   140,130x = 46,388,113,641
5. Step 5: Solve for x
   x = 46,388,113,641/140,130
6. Step 6: Final answer
   x = 331,036.28