Finding the Third Proportional to 258,048,139.50 and 409,249,300.50

Step by Step Solution

1. Step 1: Write the proportion equation
   258,048,139.50 : 409,249,300.50 = 409,249,300.50 : x
2. Step 2: Convert to fraction form
   258,048,139.50/409,249,300.50 = 409,249,300.50/x
3. Step 3: Cross multiply
   258,048,139.50x = 409,249,300.50 × 409,249,300.50
4. Step 4: Simplify right side
   258,048,139.50x = 167,484,989,959,739,296
5. Step 5: Solve for x
   x = 167,484,989,959,739,296/258,048,139.50
6. Step 6: Final answer
   x = 649,045,524.16