Finding the Third Proportional to 60,189 and 128,154.50

Step by Step Solution

1. Step 1: Write the proportion equation
   60,189 : 128,154.50 = 128,154.50 : x
2. Step 2: Convert to fraction form
   60,189/128,154.50 = 128,154.50/x
3. Step 3: Cross multiply
   60,189x = 128,154.50 × 128,154.50
4. Step 4: Simplify right side
   60,189x = 16,423,575,870.25
5. Step 5: Solve for x
   x = 16,423,575,870.25/60,189
6. Step 6: Final answer
   x = 272,866.73