Finding the Third Proportional to 128,061.75 and 187,940.63

Step by Step Solution

1. Step 1: Write the proportion equation
   128,061.75 : 187,940.63 = 187,940.63 : x
2. Step 2: Convert to fraction form
   128,061.75/187,940.63 = 187,940.63/x
3. Step 3: Cross multiply
   128,061.75x = 187,940.63 × 187,940.63
4. Step 4: Simplify right side
   128,061.75x = 35,321,678,525.39
5. Step 5: Solve for x
   x = 35,321,678,525.39/128,061.75
6. Step 6: Final answer
   x = 275,817.55