Finding the Third Proportional to 21,880.13 and 28,821.38

Step by Step Solution

1. Step 1: Write the proportion equation
   21,880.13 : 28,821.38 = 28,821.38 : x
2. Step 2: Convert to fraction form
   21,880.13/28,821.38 = 28,821.38/x
3. Step 3: Cross multiply
   21,880.13x = 28,821.38 × 28,821.38
4. Step 4: Simplify right side
   21,880.13x = 830,671,656.89
5. Step 5: Solve for x
   x = 830,671,656.89/21,880.13
6. Step 6: Final answer
   x = 37,964.67