Finding the Third Proportional to 278,914.50 and 443,238.75

Step by Step Solution

1. Step 1: Write the proportion equation
   278,914.50 : 443,238.75 = 443,238.75 : x
2. Step 2: Convert to fraction form
   278,914.50/443,238.75 = 443,238.75/x
3. Step 3: Cross multiply
   278,914.50x = 443,238.75 × 443,238.75
4. Step 4: Simplify right side
   278,914.50x = 196,460,589,501.56
5. Step 5: Solve for x
   x = 196,460,589,501.56/278,914.50
6. Step 6: Final answer
   x = 704,375.68