Finding the Third Proportional to 61,103.50 and 128,047.50

Step by Step Solution

1. Step 1: Write the proportion equation
   61,103.50 : 128,047.50 = 128,047.50 : x
2. Step 2: Convert to fraction form
   61,103.50/128,047.50 = 128,047.50/x
3. Step 3: Cross multiply
   61,103.50x = 128,047.50 × 128,047.50
4. Step 4: Simplify right side
   61,103.50x = 16,396,162,256.25
5. Step 5: Solve for x
   x = 16,396,162,256.25/61,103.50
6. Step 6: Final answer
   x = 268,334.26