Finding the Third Proportional to 391,548 and 855,012

Step by Step Solution

1. Step 1: Write the proportion equation
   391,548 : 855,012 = 855,012 : x
2. Step 2: Convert to fraction form
   391,548/855,012 = 855,012/x
3. Step 3: Cross multiply
   391,548x = 855,012 × 855,012
4. Step 4: Simplify right side
   391,548x = 731,045,520,144
5. Step 5: Solve for x
   x = 731,045,520,144/391,548
6. Step 6: Final answer
   x = 1,867,064.88