Finding the Third Proportional to 404,905.50 and 859,639.50

Step by Step Solution

1. Step 1: Write the proportion equation
   404,905.50 : 859,639.50 = 859,639.50 : x
2. Step 2: Convert to fraction form
   404,905.50/859,639.50 = 859,639.50/x
3. Step 3: Cross multiply
   404,905.50x = 859,639.50 × 859,639.50
4. Step 4: Simplify right side
   404,905.50x = 738,980,069,960.25
5. Step 5: Solve for x
   x = 738,980,069,960.25/404,905.50
6. Step 6: Final answer
   x = 1,825,068.00