Finding the Third Proportional to 128,945.50 and 197,123.50

Step by Step Solution

1. Step 1: Write the proportion equation
   128,945.50 : 197,123.50 = 197,123.50 : x
2. Step 2: Convert to fraction form
   128,945.50/197,123.50 = 197,123.50/x
3. Step 3: Cross multiply
   128,945.50x = 197,123.50 × 197,123.50
4. Step 4: Simplify right side
   128,945.50x = 38,857,674,252.25
5. Step 5: Solve for x
   x = 38,857,674,252.25/128,945.50
6. Step 6: Final answer
   x = 301,349.60