Finding the Third Proportional to 90,196 and 128,200

Step by Step Solution

1. Step 1: Write the proportion equation
   90,196 : 128,200 = 128,200 : x
2. Step 2: Convert to fraction form
   90,196/128,200 = 128,200/x
3. Step 3: Cross multiply
   90,196x = 128,200 × 128,200
4. Step 4: Simplify right side
   90,196x = 16,435,240,000
5. Step 5: Solve for x
   x = 16,435,240,000/90,196
6. Step 6: Final answer
   x = 182,216.95