Finding the Third Proportional to 319,070 and 493,990.50

Step by Step Solution

1. Step 1: Write the proportion equation
   319,070 : 493,990.50 = 493,990.50 : x
2. Step 2: Convert to fraction form
   319,070/493,990.50 = 493,990.50/x
3. Step 3: Cross multiply
   319,070x = 493,990.50 × 493,990.50
4. Step 4: Simplify right side
   319,070x = 244,026,614,090.25
5. Step 5: Solve for x
   x = 244,026,614,090.25/319,070
6. Step 6: Final answer
   x = 764,805.89