Finding the Third Proportional to 9,859 and 21,358

Step by Step Solution

1. Step 1: Write the proportion equation
   9,859 : 21,358 = 21,358 : x
2. Step 2: Convert to fraction form
   9,859/21,358 = 21,358/x
3. Step 3: Cross multiply
   9,859x = 21,358 × 21,358
4. Step 4: Simplify right side
   9,859x = 456,164,164
5. Step 5: Solve for x
   x = 456,164,164/9,859
6. Step 6: Final answer
   x = 46,268.81