Finding the Third Proportional to 128,980 and 175,151.50

Step by Step Solution

1. Step 1: Write the proportion equation
   128,980 : 175,151.50 = 175,151.50 : x
2. Step 2: Convert to fraction form
   128,980/175,151.50 = 175,151.50/x
3. Step 3: Cross multiply
   128,980x = 175,151.50 × 175,151.50
4. Step 4: Simplify right side
   128,980x = 30,678,047,952.25
5. Step 5: Solve for x
   x = 30,678,047,952.25/128,980
6. Step 6: Final answer
   x = 237,851.20