Finding the Third Proportional to 139,070 and 299,106

Step by Step Solution

1. Step 1: Write the proportion equation
   139,070 : 299,106 = 299,106 : x
2. Step 2: Convert to fraction form
   139,070/299,106 = 299,106/x
3. Step 3: Cross multiply
   139,070x = 299,106 × 299,106
4. Step 4: Simplify right side
   139,070x = 89,464,399,236
5. Step 5: Solve for x
   x = 89,464,399,236/139,070
6. Step 6: Final answer
   x = 643,304.81