Finding the Third Proportional to 155,918 and 243,003

Step by Step Solution

1. Step 1: Write the proportion equation
   155,918 : 243,003 = 243,003 : x
2. Step 2: Convert to fraction form
   155,918/243,003 = 243,003/x
3. Step 3: Cross multiply
   155,918x = 243,003 × 243,003
4. Step 4: Simplify right side
   155,918x = 59,050,458,009
5. Step 5: Solve for x
   x = 59,050,458,009/155,918
6. Step 6: Final answer
   x = 378,727.65