Finding the Third Proportional to 248,790,438 and 539,870,404.50

Step by Step Solution

1. Step 1: Write the proportion equation
   248,790,438 : 539,870,404.50 = 539,870,404.50 : x
2. Step 2: Convert to fraction form
   248,790,438/539,870,404.50 = 539,870,404.50/x
3. Step 3: Cross multiply
   248,790,438x = 539,870,404.50 × 539,870,404.50
4. Step 4: Simplify right side
   248,790,438x = 291,460,053,654,993,600
5. Step 5: Solve for x
   x = 291,460,053,654,993,600/248,790,438
6. Step 6: Final answer
   x = 1,171,508,262.13