Finding the Third Proportional to 123,245 and 258,925

Step by Step Solution

1. Step 1: Write the proportion equation
   123,245 : 258,925 = 258,925 : x
2. Step 2: Convert to fraction form
   123,245/258,925 = 258,925/x
3. Step 3: Cross multiply
   123,245x = 258,925 × 258,925
4. Step 4: Simplify right side
   123,245x = 67,042,155,625
5. Step 5: Solve for x
   x = 67,042,155,625/123,245
6. Step 6: Final answer
   x = 543,974.65