Finding the Third Proportional to 281,109.50 and 434,800.50

Step by Step Solution

1. Step 1: Write the proportion equation
   281,109.50 : 434,800.50 = 434,800.50 : x
2. Step 2: Convert to fraction form
   281,109.50/434,800.50 = 434,800.50/x
3. Step 3: Cross multiply
   281,109.50x = 434,800.50 × 434,800.50
4. Step 4: Simplify right side
   281,109.50x = 189,051,474,800.25
5. Step 5: Solve for x
   x = 189,051,474,800.25/281,109.50
6. Step 6: Final answer
   x = 672,518.98