Finding the Third Proportional to 139,112 and 299,818

Step by Step Solution

1. Step 1: Write the proportion equation
   139,112 : 299,818 = 299,818 : x
2. Step 2: Convert to fraction form
   139,112/299,818 = 299,818/x
3. Step 3: Cross multiply
   139,112x = 299,818 × 299,818
4. Step 4: Simplify right side
   139,112x = 89,890,833,124
5. Step 5: Solve for x
   x = 89,890,833,124/139,112
6. Step 6: Final answer
   x = 646,175.98