Finding the Third Proportional to 59,701.50 and 128,538

Step by Step Solution

1. Step 1: Write the proportion equation
   59,701.50 : 128,538 = 128,538 : x
2. Step 2: Convert to fraction form
   59,701.50/128,538 = 128,538/x
3. Step 3: Cross multiply
   59,701.50x = 128,538 × 128,538
4. Step 4: Simplify right side
   59,701.50x = 16,522,017,444
5. Step 5: Solve for x
   x = 16,522,017,444/59,701.50
6. Step 6: Final answer
   x = 276,743.76