Finding the Third Proportional to 92,710.50 and 128,980.50

Step by Step Solution

1. Step 1: Write the proportion equation
   92,710.50 : 128,980.50 = 128,980.50 : x
2. Step 2: Convert to fraction form
   92,710.50/128,980.50 = 128,980.50/x
3. Step 3: Cross multiply
   92,710.50x = 128,980.50 × 128,980.50
4. Step 4: Simplify right side
   92,710.50x = 16,635,969,380.25
5. Step 5: Solve for x
   x = 16,635,969,380.25/92,710.50
6. Step 6: Final answer
   x = 179,439.97