Finding the Third Proportional to 59,770.50 and 128,762.50

Step by Step Solution

1. Step 1: Write the proportion equation
   59,770.50 : 128,762.50 = 128,762.50 : x
2. Step 2: Convert to fraction form
   59,770.50/128,762.50 = 128,762.50/x
3. Step 3: Cross multiply
   59,770.50x = 128,762.50 × 128,762.50
4. Step 4: Simplify right side
   59,770.50x = 16,579,781,406.25
5. Step 5: Solve for x
   x = 16,579,781,406.25/59,770.50
6. Step 6: Final answer
   x = 277,390.71