Finding the Third Proportional to 58,980 and 128,329.50

Step by Step Solution

1. Step 1: Write the proportion equation
   58,980 : 128,329.50 = 128,329.50 : x
2. Step 2: Convert to fraction form
   58,980/128,329.50 = 128,329.50/x
3. Step 3: Cross multiply
   58,980x = 128,329.50 × 128,329.50
4. Step 4: Simplify right side
   58,980x = 16,468,460,570.25
5. Step 5: Solve for x
   x = 16,468,460,570.25/58,980
6. Step 6: Final answer
   x = 279,221.10