Finding the Third Proportional to 128,322 and 187,606.50

Step by Step Solution

1. Step 1: Write the proportion equation
   128,322 : 187,606.50 = 187,606.50 : x
2. Step 2: Convert to fraction form
   128,322/187,606.50 = 187,606.50/x
3. Step 3: Cross multiply
   128,322x = 187,606.50 × 187,606.50
4. Step 4: Simplify right side
   128,322x = 35,196,198,842.25
5. Step 5: Solve for x
   x = 35,196,198,842.25/128,322
6. Step 6: Final answer
   x = 274,280.32