Finding the Third Proportional to 390,662 and 587,034

Step by Step Solution

1. Step 1: Write the proportion equation
   390,662 : 587,034 = 587,034 : x
2. Step 2: Convert to fraction form
   390,662/587,034 = 587,034/x
3. Step 3: Cross multiply
   390,662x = 587,034 × 587,034
4. Step 4: Simplify right side
   390,662x = 344,608,917,156
5. Step 5: Solve for x
   x = 344,608,917,156/390,662
6. Step 6: Final answer
   x = 882,115.27