Finding the Third Proportional to 391,030 and 856,802

Step by Step Solution

1. Step 1: Write the proportion equation
   391,030 : 856,802 = 856,802 : x
2. Step 2: Convert to fraction form
   391,030/856,802 = 856,802/x
3. Step 3: Cross multiply
   391,030x = 856,802 × 856,802
4. Step 4: Simplify right side
   391,030x = 734,109,667,204
5. Step 5: Solve for x
   x = 734,109,667,204/391,030
6. Step 6: Final answer
   x = 1,877,374.29