Finding the Third Proportional to 58,640 and 128,034.50

Step by Step Solution

1. Step 1: Write the proportion equation
   58,640 : 128,034.50 = 128,034.50 : x
2. Step 2: Convert to fraction form
   58,640/128,034.50 = 128,034.50/x
3. Step 3: Cross multiply
   58,640x = 128,034.50 × 128,034.50
4. Step 4: Simplify right side
   58,640x = 16,392,833,190.25
5. Step 5: Solve for x
   x = 16,392,833,190.25/58,640
6. Step 6: Final answer
   x = 279,550.36