Finding the Third Proportional to 281,488.50 and 414,814.50

Step by Step Solution

1. Step 1: Write the proportion equation
   281,488.50 : 414,814.50 = 414,814.50 : x
2. Step 2: Convert to fraction form
   281,488.50/414,814.50 = 414,814.50/x
3. Step 3: Cross multiply
   281,488.50x = 414,814.50 × 414,814.50
4. Step 4: Simplify right side
   281,488.50x = 172,071,069,410.25
5. Step 5: Solve for x
   x = 172,071,069,410.25/281,488.50
6. Step 6: Final answer
   x = 611,289.87