Finding the Third Proportional to 64,718,839.50 and 139,042,981.50

Step by Step Solution

1. Step 1: Write the proportion equation
   64,718,839.50 : 139,042,981.50 = 139,042,981.50 : x
2. Step 2: Convert to fraction form
   64,718,839.50/139,042,981.50 = 139,042,981.50/x
3. Step 3: Cross multiply
   64,718,839.50x = 139,042,981.50 × 139,042,981.50
4. Step 4: Simplify right side
   64,718,839.50x = 19,332,950,704,409,344
5. Step 5: Solve for x
   x = 19,332,950,704,409,344/64,718,839.50
6. Step 6: Final answer
   x = 298,722,147.27