Finding the Third Proportional to 58,679 and 128,110.50

Step by Step Solution

1. Step 1: Write the proportion equation
   58,679 : 128,110.50 = 128,110.50 : x
2. Step 2: Convert to fraction form
   58,679/128,110.50 = 128,110.50/x
3. Step 3: Cross multiply
   58,679x = 128,110.50 × 128,110.50
4. Step 4: Simplify right side
   58,679x = 16,412,300,210.25
5. Step 5: Solve for x
   x = 16,412,300,210.25/58,679
6. Step 6: Final answer
   x = 279,696.32