Finding the Third Proportional to 420,756 and 912,844.50

Step by Step Solution

1. Step 1: Write the proportion equation
   420,756 : 912,844.50 = 912,844.50 : x
2. Step 2: Convert to fraction form
   420,756/912,844.50 = 912,844.50/x
3. Step 3: Cross multiply
   420,756x = 912,844.50 × 912,844.50
4. Step 4: Simplify right side
   420,756x = 833,285,081,180.25
5. Step 5: Solve for x
   x = 833,285,081,180.25/420,756
6. Step 6: Final answer
   x = 1,980,447.29