Finding the Third Proportional to 1,217,241 and 1,780,789.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,217,241 : 1,780,789.50 = 1,780,789.50 : x
2. Step 2: Convert to fraction form
   1,217,241/1,780,789.50 = 1,780,789.50/x
3. Step 3: Cross multiply
   1,217,241x = 1,780,789.50 × 1,780,789.50
4. Step 4: Simplify right side
   1,217,241x = 3,171,211,243,310.25
5. Step 5: Solve for x
   x = 3,171,211,243,310.25/1,217,241
6. Step 6: Final answer
   x = 2,605,245.18