Finding the Third Proportional to 138,853,804 and 298,604,308

Step by Step Solution

1. Step 1: Write the proportion equation
   138,853,804 : 298,604,308 = 298,604,308 : x
2. Step 2: Convert to fraction form
   138,853,804/298,604,308 = 298,604,308/x
3. Step 3: Cross multiply
   138,853,804x = 298,604,308 × 298,604,308
4. Step 4: Simplify right side
   138,853,804x = 89,164,532,756,158,864
5. Step 5: Solve for x
   x = 89,164,532,756,158,864/138,853,804
6. Step 6: Final answer
   x = 642,146,849.33