Finding the Third Proportional to 128,367 and 199,546.88

Step by Step Solution

1. Step 1: Write the proportion equation
   128,367 : 199,546.88 = 199,546.88 : x
2. Step 2: Convert to fraction form
   128,367/199,546.88 = 199,546.88/x
3. Step 3: Cross multiply
   128,367x = 199,546.88 × 199,546.88
4. Step 4: Simplify right side
   128,367x = 39,818,955,322.27
5. Step 5: Solve for x
   x = 39,818,955,322.27/128,367
6. Step 6: Final answer
   x = 310,196.20