Finding the Third Proportional to 299,173.50 and 448,978.50

Step by Step Solution

1. Step 1: Write the proportion equation
   299,173.50 : 448,978.50 = 448,978.50 : x
2. Step 2: Convert to fraction form
   299,173.50/448,978.50 = 448,978.50/x
3. Step 3: Cross multiply
   299,173.50x = 448,978.50 × 448,978.50
4. Step 4: Simplify right side
   299,173.50x = 201,581,693,462.25
5. Step 5: Solve for x
   x = 201,581,693,462.25/299,173.50
6. Step 6: Final answer
   x = 673,795.28