Finding the Third Proportional to 290,216,349.56 and 443,765,074.50

Step by Step Solution

1. Step 1: Write the proportion equation
   290,216,349.56 : 443,765,074.50 = 443,765,074.50 : x
2. Step 2: Convert to fraction form
   290,216,349.56/443,765,074.50 = 443,765,074.50/x
3. Step 3: Cross multiply
   290,216,349.56x = 443,765,074.50 × 443,765,074.50
4. Step 4: Simplify right side
   290,216,349.56x = 196,927,441,345,990,560
5. Step 5: Solve for x
   x = 196,927,441,345,990,560/290,216,349.56
6. Step 6: Final answer
   x = 678,553,918.97