Finding the Third Proportional to 185,389,218 and 280,469,854

Step by Step Solution

1. Step 1: Write the proportion equation
   185,389,218 : 280,469,854 = 280,469,854 : x
2. Step 2: Convert to fraction form
   185,389,218/280,469,854 = 280,469,854/x
3. Step 3: Cross multiply
   185,389,218x = 280,469,854 × 280,469,854
4. Step 4: Simplify right side
   185,389,218x = 78,663,339,002,781,312
5. Step 5: Solve for x
   x = 78,663,339,002,781,312/185,389,218
6. Step 6: Final answer
   x = 424,314,530.54