Finding the Third Proportional to 59,439 and 123,859.50

Step by Step Solution

1. Step 1: Write the proportion equation
   59,439 : 123,859.50 = 123,859.50 : x
2. Step 2: Convert to fraction form
   59,439/123,859.50 = 123,859.50/x
3. Step 3: Cross multiply
   59,439x = 123,859.50 × 123,859.50
4. Step 4: Simplify right side
   59,439x = 15,341,175,740.25
5. Step 5: Solve for x
   x = 15,341,175,740.25/59,439
6. Step 6: Final answer
   x = 258,099.49