Finding the Third Proportional to 28,638.75 and 61,510.50

Step by Step Solution

1. Step 1: Write the proportion equation
   28,638.75 : 61,510.50 = 61,510.50 : x
2. Step 2: Convert to fraction form
   28,638.75/61,510.50 = 61,510.50/x
3. Step 3: Cross multiply
   28,638.75x = 61,510.50 × 61,510.50
4. Step 4: Simplify right side
   28,638.75x = 3,783,541,610.25
5. Step 5: Solve for x
   x = 3,783,541,610.25/28,638.75
6. Step 6: Final answer
   x = 132,112.67