Finding the Third Proportional to 147,999 and 320,905.50

Step by Step Solution

1. Step 1: Write the proportion equation
   147,999 : 320,905.50 = 320,905.50 : x
2. Step 2: Convert to fraction form
   147,999/320,905.50 = 320,905.50/x
3. Step 3: Cross multiply
   147,999x = 320,905.50 × 320,905.50
4. Step 4: Simplify right side
   147,999x = 102,980,339,930.25
5. Step 5: Solve for x
   x = 102,980,339,930.25/147,999
6. Step 6: Final answer
   x = 695,817.81