Finding the Third Proportional to 21,515.63 and 28,856.25

Step by Step Solution

1. Step 1: Write the proportion equation
   21,515.63 : 28,856.25 = 28,856.25 : x
2. Step 2: Convert to fraction form
   21,515.63/28,856.25 = 28,856.25/x
3. Step 3: Cross multiply
   21,515.63x = 28,856.25 × 28,856.25
4. Step 4: Simplify right side
   21,515.63x = 832,683,164.06
5. Step 5: Solve for x
   x = 832,683,164.06/21,515.63
6. Step 6: Final answer
   x = 38,701.32