Finding the Third Proportional to 780,663 and 1,807,123

Step by Step Solution

1. Step 1: Write the proportion equation
   780,663 : 1,807,123 = 1,807,123 : x
2. Step 2: Convert to fraction form
   780,663/1,807,123 = 1,807,123/x
3. Step 3: Cross multiply
   780,663x = 1,807,123 × 1,807,123
4. Step 4: Simplify right side
   780,663x = 3,265,693,537,129
5. Step 5: Solve for x
   x = 3,265,693,537,129/780,663
6. Step 6: Final answer
   x = 4,183,230.84