Finding the Third Proportional to 128,612 and 183,459.50

Step by Step Solution

1. Step 1: Write the proportion equation
   128,612 : 183,459.50 = 183,459.50 : x
2. Step 2: Convert to fraction form
   128,612/183,459.50 = 183,459.50/x
3. Step 3: Cross multiply
   128,612x = 183,459.50 × 183,459.50
4. Step 4: Simplify right side
   128,612x = 33,657,388,140.25
5. Step 5: Solve for x
   x = 33,657,388,140.25/128,612
6. Step 6: Final answer
   x = 261,697.11