Finding the Third Proportional to 8,439 and 13,468.50

Step by Step Solution

1. Step 1: Write the proportion equation
   8,439 : 13,468.50 = 13,468.50 : x
2. Step 2: Convert to fraction form
   8,439/13,468.50 = 13,468.50/x
3. Step 3: Cross multiply
   8,439x = 13,468.50 × 13,468.50
4. Step 4: Simplify right side
   8,439x = 181,400,492.25
5. Step 5: Solve for x
   x = 181,400,492.25/8,439
6. Step 6: Final answer
   x = 21,495.50