Finding the Third Proportional to 290,216,352 and 443,765,078

Step by Step Solution

1. Step 1: Write the proportion equation
   290,216,352 : 443,765,078 = 443,765,078 : x
2. Step 2: Convert to fraction form
   290,216,352/443,765,078 = 443,765,078/x
3. Step 3: Cross multiply
   290,216,352x = 443,765,078 × 443,765,078
4. Step 4: Simplify right side
   290,216,352x = 196,927,444,452,346,080
5. Step 5: Solve for x
   x = 196,927,444,452,346,080/290,216,352
6. Step 6: Final answer
   x = 678,553,923.98