Finding the Third Proportional to 21,358 and 34,120

Step by Step Solution

1. Step 1: Write the proportion equation
   21,358 : 34,120 = 34,120 : x
2. Step 2: Convert to fraction form
   21,358/34,120 = 34,120/x
3. Step 3: Cross multiply
   21,358x = 34,120 × 34,120
4. Step 4: Simplify right side
   21,358x = 1,164,174,400
5. Step 5: Solve for x
   x = 1,164,174,400/21,358
6. Step 6: Final answer
   x = 54,507.65