Finding the Third Proportional to 113,217 and 239,920.50

Step by Step Solution

1. Step 1: Write the proportion equation
   113,217 : 239,920.50 = 239,920.50 : x
2. Step 2: Convert to fraction form
   113,217/239,920.50 = 239,920.50/x
3. Step 3: Cross multiply
   113,217x = 239,920.50 × 239,920.50
4. Step 4: Simplify right side
   113,217x = 57,561,846,320.25
5. Step 5: Solve for x
   x = 57,561,846,320.25/113,217
6. Step 6: Final answer
   x = 508,420.52