Finding the Third Proportional to 13,890.38 and 21,513.94

Step by Step Solution

1. Step 1: Write the proportion equation
   13,890.38 : 21,513.94 = 21,513.94 : x
2. Step 2: Convert to fraction form
   13,890.38/21,513.94 = 21,513.94/x
3. Step 3: Cross multiply
   13,890.38x = 21,513.94 × 21,513.94
4. Step 4: Simplify right side
   13,890.38x = 462,849,506.75
5. Step 5: Solve for x
   x = 462,849,506.75/13,890.38
6. Step 6: Final answer
   x = 33,321.60