Finding the Third Proportional to 139,034 and 305,139

Step by Step Solution

1. Step 1: Write the proportion equation
   139,034 : 305,139 = 305,139 : x
2. Step 2: Convert to fraction form
   139,034/305,139 = 305,139/x
3. Step 3: Cross multiply
   139,034x = 305,139 × 305,139
4. Step 4: Simplify right side
   139,034x = 93,109,809,321
5. Step 5: Solve for x
   x = 93,109,809,321/139,034
6. Step 6: Final answer
   x = 669,690.93