Finding the Third Proportional to 21,090.38 and 28,410.75

Step by Step Solution

1. Step 1: Write the proportion equation
   21,090.38 : 28,410.75 = 28,410.75 : x
2. Step 2: Convert to fraction form
   21,090.38/28,410.75 = 28,410.75/x
3. Step 3: Cross multiply
   21,090.38x = 28,410.75 × 28,410.75
4. Step 4: Simplify right side
   21,090.38x = 807,170,715.56
5. Step 5: Solve for x
   x = 807,170,715.56/21,090.38
6. Step 6: Final answer
   x = 38,271.99