Finding the Third Proportional to 298,628,078 and 621,094,454

Step by Step Solution

1. Step 1: Write the proportion equation
   298,628,078 : 621,094,454 = 621,094,454 : x
2. Step 2: Convert to fraction form
   298,628,078/621,094,454 = 621,094,454/x
3. Step 3: Cross multiply
   298,628,078x = 621,094,454 × 621,094,454
4. Step 4: Simplify right side
   298,628,078x = 385,758,320,789,558,144
5. Step 5: Solve for x
   x = 385,758,320,789,558,144/298,628,078
6. Step 6: Final answer
   x = 1,291,768,421.02