Finding the Third Proportional to 21,501 and 28,890

Step by Step Solution

1. Step 1: Write the proportion equation
   21,501 : 28,890 = 28,890 : x
2. Step 2: Convert to fraction form
   21,501/28,890 = 28,890/x
3. Step 3: Cross multiply
   21,501x = 28,890 × 28,890
4. Step 4: Simplify right side
   21,501x = 834,632,100
5. Step 5: Solve for x
   x = 834,632,100/21,501
6. Step 6: Final answer
   x = 38,818.29