Finding the Third Proportional to 301,250.50 and 435,290.50

Step by Step Solution

1. Step 1: Write the proportion equation
   301,250.50 : 435,290.50 = 435,290.50 : x
2. Step 2: Convert to fraction form
   301,250.50/435,290.50 = 435,290.50/x
3. Step 3: Cross multiply
   301,250.50x = 435,290.50 × 435,290.50
4. Step 4: Simplify right side
   301,250.50x = 189,477,819,390.25
5. Step 5: Solve for x
   x = 189,477,819,390.25/301,250.50
6. Step 6: Final answer
   x = 628,970.97