Finding the Third Proportional to 128,811 and 197,044.50

Step by Step Solution

1. Step 1: Write the proportion equation
   128,811 : 197,044.50 = 197,044.50 : x
2. Step 2: Convert to fraction form
   128,811/197,044.50 = 197,044.50/x
3. Step 3: Cross multiply
   128,811x = 197,044.50 × 197,044.50
4. Step 4: Simplify right side
   128,811x = 38,826,534,980.25
5. Step 5: Solve for x
   x = 38,826,534,980.25/128,811
6. Step 6: Final answer
   x = 301,422.51