Finding the Third Proportional to 21,125.81 and 28,286.72

Step by Step Solution

1. Step 1: Write the proportion equation
   21,125.81 : 28,286.72 = 28,286.72 : x
2. Step 2: Convert to fraction form
   21,125.81/28,286.72 = 28,286.72/x
3. Step 3: Cross multiply
   21,125.81x = 28,286.72 × 28,286.72
4. Step 4: Simplify right side
   21,125.81x = 800,138,457.64
5. Step 5: Solve for x
   x = 800,138,457.64/21,125.81
6. Step 6: Final answer
   x = 37,874.92