Finding the Third Proportional to 400,288.50 and 608,680.50

Step by Step Solution

1. Step 1: Write the proportion equation
   400,288.50 : 608,680.50 = 608,680.50 : x
2. Step 2: Convert to fraction form
   400,288.50/608,680.50 = 608,680.50/x
3. Step 3: Cross multiply
   400,288.50x = 608,680.50 × 608,680.50
4. Step 4: Simplify right side
   400,288.50x = 370,491,951,080.25
5. Step 5: Solve for x
   x = 370,491,951,080.25/400,288.50
6. Step 6: Final answer
   x = 925,562.32