Finding the Third Proportional to 290,216,351 and 443,765,076.50

Step by Step Solution

1. Step 1: Write the proportion equation
   290,216,351 : 443,765,076.50 = 443,765,076.50 : x
2. Step 2: Convert to fraction form
   290,216,351/443,765,076.50 = 443,765,076.50/x
3. Step 3: Cross multiply
   290,216,351x = 443,765,076.50 × 443,765,076.50
4. Step 4: Simplify right side
   290,216,351x = 196,927,443,121,050,848
5. Step 5: Solve for x
   x = 196,927,443,121,050,848/290,216,351
6. Step 6: Final answer
   x = 678,553,921.73