Finding the Third Proportional to 231,074 and 309,079

Step by Step Solution

1. Step 1: Write the proportion equation
   231,074 : 309,079 = 309,079 : x
2. Step 2: Convert to fraction form
   231,074/309,079 = 309,079/x
3. Step 3: Cross multiply
   231,074x = 309,079 × 309,079
4. Step 4: Simplify right side
   231,074x = 95,529,828,241
5. Step 5: Solve for x
   x = 95,529,828,241/231,074
6. Step 6: Final answer
   x = 413,416.60