Finding the Third Proportional to 240,003 and 309,703.50

Step by Step Solution

1. Step 1: Write the proportion equation
   240,003 : 309,703.50 = 309,703.50 : x
2. Step 2: Convert to fraction form
   240,003/309,703.50 = 309,703.50/x
3. Step 3: Cross multiply
   240,003x = 309,703.50 × 309,703.50
4. Step 4: Simplify right side
   240,003x = 95,916,257,912.25
5. Step 5: Solve for x
   x = 95,916,257,912.25/240,003
6. Step 6: Final answer
   x = 399,646.08