Finding the Third Proportional to 290,347,993 and 443,853,870

Step by Step Solution

1. Step 1: Write the proportion equation
   290,347,993 : 443,853,870 = 443,853,870 : x
2. Step 2: Convert to fraction form
   290,347,993/443,853,870 = 443,853,870/x
3. Step 3: Cross multiply
   290,347,993x = 443,853,870 × 443,853,870
4. Step 4: Simplify right side
   290,347,993x = 197,006,257,913,976,896
5. Step 5: Solve for x
   x = 197,006,257,913,976,896/290,347,993
6. Step 6: Final answer
   x = 678,517,718.96