Finding the Third Proportional to 248,513,443.50 and 388,994,790

Step by Step Solution

1. Step 1: Write the proportion equation
   248,513,443.50 : 388,994,790 = 388,994,790 : x
2. Step 2: Convert to fraction form
   248,513,443.50/388,994,790 = 388,994,790/x
3. Step 3: Cross multiply
   248,513,443.50x = 388,994,790 × 388,994,790
4. Step 4: Simplify right side
   248,513,443.50x = 151,316,946,647,144,096
5. Step 5: Solve for x
   x = 151,316,946,647,144,096/248,513,443.50
6. Step 6: Final answer
   x = 608,888,374.47