Finding the Third Proportional to 122,328 and 259,357.50

Step by Step Solution

1. Step 1: Write the proportion equation
   122,328 : 259,357.50 = 259,357.50 : x
2. Step 2: Convert to fraction form
   122,328/259,357.50 = 259,357.50/x
3. Step 3: Cross multiply
   122,328x = 259,357.50 × 259,357.50
4. Step 4: Simplify right side
   122,328x = 67,266,312,806.25
5. Step 5: Solve for x
   x = 67,266,312,806.25/122,328
6. Step 6: Final answer
   x = 549,884.84