Finding the Third Proportional to 138,769.50 and 303,219

Step by Step Solution

1. Step 1: Write the proportion equation
   138,769.50 : 303,219 = 303,219 : x
2. Step 2: Convert to fraction form
   138,769.50/303,219 = 303,219/x
3. Step 3: Cross multiply
   138,769.50x = 303,219 × 303,219
4. Step 4: Simplify right side
   138,769.50x = 91,941,761,961
5. Step 5: Solve for x
   x = 91,941,761,961/138,769.50
6. Step 6: Final answer
   x = 662,550.21