Finding the Third Proportional to 311,526,396 and 664,749,648

Step by Step Solution

1. Step 1: Write the proportion equation
   311,526,396 : 664,749,648 = 664,749,648 : x
2. Step 2: Convert to fraction form
   311,526,396/664,749,648 = 664,749,648/x
3. Step 3: Cross multiply
   311,526,396x = 664,749,648 × 664,749,648
4. Step 4: Simplify right side
   311,526,396x = 441,892,094,516,123,904
5. Step 5: Solve for x
   x = 441,892,094,516,123,904/311,526,396
6. Step 6: Final answer
   x = 1,418,474,004.74