Finding the Third Proportional to 60,118.50 and 128,575.50

Step by Step Solution

1. Step 1: Write the proportion equation
   60,118.50 : 128,575.50 = 128,575.50 : x
2. Step 2: Convert to fraction form
   60,118.50/128,575.50 = 128,575.50/x
3. Step 3: Cross multiply
   60,118.50x = 128,575.50 × 128,575.50
4. Step 4: Simplify right side
   60,118.50x = 16,531,659,200.25
5. Step 5: Solve for x
   x = 16,531,659,200.25/60,118.50
6. Step 6: Final answer
   x = 274,984.56