Finding the Third Proportional to 138,852,177 and 298,601,139

Step by Step Solution

1. Step 1: Write the proportion equation
   138,852,177 : 298,601,139 = 298,601,139 : x
2. Step 2: Convert to fraction form
   138,852,177/298,601,139 = 298,601,139/x
3. Step 3: Cross multiply
   138,852,177x = 298,601,139 × 298,601,139
4. Step 4: Simplify right side
   138,852,177x = 89,162,640,212,097,328
5. Step 5: Solve for x
   x = 89,162,640,212,097,328/138,852,177
6. Step 6: Final answer
   x = 642,140,743.76