Finding the Third Proportional to 290,347,969 and 443,853,825.50

Step by Step Solution

1. Step 1: Write the proportion equation
   290,347,969 : 443,853,825.50 = 443,853,825.50 : x
2. Step 2: Convert to fraction form
   290,347,969/443,853,825.50 = 443,853,825.50/x
3. Step 3: Cross multiply
   290,347,969x = 443,853,825.50 × 443,853,825.50
4. Step 4: Simplify right side
   290,347,969x = 197,006,218,410,984,448
5. Step 5: Solve for x
   x = 197,006,218,410,984,448/290,347,969
6. Step 6: Final answer
   x = 678,517,638.99