Finding the Third Proportional to 138,030.75 and 303,196.50

Step by Step Solution

1. Step 1: Write the proportion equation
   138,030.75 : 303,196.50 = 303,196.50 : x
2. Step 2: Convert to fraction form
   138,030.75/303,196.50 = 303,196.50/x
3. Step 3: Cross multiply
   138,030.75x = 303,196.50 × 303,196.50
4. Step 4: Simplify right side
   138,030.75x = 91,928,117,612.25
5. Step 5: Solve for x
   x = 91,928,117,612.25/138,030.75
6. Step 6: Final answer
   x = 665,997.38