Finding the Third Proportional to 91,123 and 128,264

Step by Step Solution

1. Step 1: Write the proportion equation
   91,123 : 128,264 = 128,264 : x
2. Step 2: Convert to fraction form
   91,123/128,264 = 128,264/x
3. Step 3: Cross multiply
   91,123x = 128,264 × 128,264
4. Step 4: Simplify right side
   91,123x = 16,451,653,696
5. Step 5: Solve for x
   x = 16,451,653,696/91,123
6. Step 6: Final answer
   x = 180,543.37