Finding the Third Proportional to 128,872.50 and 197,136

Step by Step Solution

1. Step 1: Write the proportion equation
   128,872.50 : 197,136 = 197,136 : x
2. Step 2: Convert to fraction form
   128,872.50/197,136 = 197,136/x
3. Step 3: Cross multiply
   128,872.50x = 197,136 × 197,136
4. Step 4: Simplify right side
   128,872.50x = 38,862,602,496
5. Step 5: Solve for x
   x = 38,862,602,496/128,872.50
6. Step 6: Final answer
   x = 301,558.54