Finding the Third Proportional to 258,947,510 and 554,738,680

Step by Step Solution

1. Step 1: Write the proportion equation
   258,947,510 : 554,738,680 = 554,738,680 : x
2. Step 2: Convert to fraction form
   258,947,510/554,738,680 = 554,738,680/x
3. Step 3: Cross multiply
   258,947,510x = 554,738,680 × 554,738,680
4. Step 4: Simplify right side
   258,947,510x = 307,735,003,088,142,400
5. Step 5: Solve for x
   x = 307,735,003,088,142,400/258,947,510
6. Step 6: Final answer
   x = 1,188,406,882.49