Finding the Third Proportional to 258,945,984 and 554,827,077

Step by Step Solution

1. Step 1: Write the proportion equation
   258,945,984 : 554,827,077 = 554,827,077 : x
2. Step 2: Convert to fraction form
   258,945,984/554,827,077 = 554,827,077/x
3. Step 3: Cross multiply
   258,945,984x = 554,827,077 × 554,827,077
4. Step 4: Simplify right side
   258,945,984x = 307,833,085,372,363,904
5. Step 5: Solve for x
   x = 307,833,085,372,363,904/258,945,984
6. Step 6: Final answer
   x = 1,188,792,660.99