Finding the Third Proportional to 59,040 and 128,970

Step by Step Solution

1. Step 1: Write the proportion equation
   59,040 : 128,970 = 128,970 : x
2. Step 2: Convert to fraction form
   59,040/128,970 = 128,970/x
3. Step 3: Cross multiply
   59,040x = 128,970 × 128,970
4. Step 4: Simplify right side
   59,040x = 16,633,260,900
5. Step 5: Solve for x
   x = 16,633,260,900/59,040
6. Step 6: Final answer
   x = 281,728.67