Finding the Third Proportional to 113,210.50 and 235,609

Step by Step Solution

1. Step 1: Write the proportion equation
   113,210.50 : 235,609 = 235,609 : x
2. Step 2: Convert to fraction form
   113,210.50/235,609 = 235,609/x
3. Step 3: Cross multiply
   113,210.50x = 235,609 × 235,609
4. Step 4: Simplify right side
   113,210.50x = 55,511,600,881
5. Step 5: Solve for x
   x = 55,511,600,881/113,210.50
6. Step 6: Final answer
   x = 490,339.68