Finding the Third Proportional to 221,055,980,949 and 339,569,030,488.50

Step by Step Solution

1. Step 1: Write the proportion equation
   221,055,980,949 : 339,569,030,488.50 = 339,569,030,488.50 : x
2. Step 2: Convert to fraction form
   221,055,980,949/339,569,030,488.50 = 339,569,030,488.50/x
3. Step 3: Cross multiply
   221,055,980,949x = 339,569,030,488.50 × 339,569,030,488.50
4. Step 4: Simplify right side
   221,055,980,949x = 115,307,126,466,899,846,627,328
5. Step 5: Solve for x
   x = 115,307,126,466,899,846,627,328/221,055,980,949
6. Step 6: Final answer
   x = 521,619,573,340.12