Finding the Third Proportional to 128,618 and 183,468.50

Step by Step Solution

1. Step 1: Write the proportion equation
   128,618 : 183,468.50 = 183,468.50 : x
2. Step 2: Convert to fraction form
   128,618/183,468.50 = 183,468.50/x
3. Step 3: Cross multiply
   128,618x = 183,468.50 × 183,468.50
4. Step 4: Simplify right side
   128,618x = 33,660,690,492.25
5. Step 5: Solve for x
   x = 33,660,690,492.25/128,618
6. Step 6: Final answer
   x = 261,710.57