Finding the Third Proportional to 11,499.25 and 21,358

Step by Step Solution

1. Step 1: Write the proportion equation
   11,499.25 : 21,358 = 21,358 : x
2. Step 2: Convert to fraction form
   11,499.25/21,358 = 21,358/x
3. Step 3: Cross multiply
   11,499.25x = 21,358 × 21,358
4. Step 4: Simplify right side
   11,499.25x = 456,164,164
5. Step 5: Solve for x
   x = 456,164,164/11,499.25
6. Step 6: Final answer
   x = 39,669.04