Finding the Third Proportional to 69,390 and 154,308

Step by Step Solution

1. Step 1: Write the proportion equation
   69,390 : 154,308 = 154,308 : x
2. Step 2: Convert to fraction form
   69,390/154,308 = 154,308/x
3. Step 3: Cross multiply
   69,390x = 154,308 × 154,308
4. Step 4: Simplify right side
   69,390x = 23,810,958,864
5. Step 5: Solve for x
   x = 23,810,958,864/69,390
6. Step 6: Final answer
   x = 343,146.83