Finding the Third Proportional to 21,790.69 and 38,503.69

Step by Step Solution

1. Step 1: Write the proportion equation
   21,790.69 : 38,503.69 = 38,503.69 : x
2. Step 2: Convert to fraction form
   21,790.69/38,503.69 = 38,503.69/x
3. Step 3: Cross multiply
   21,790.69x = 38,503.69 × 38,503.69
4. Step 4: Simplify right side
   21,790.69x = 1,482,533,951.10
5. Step 5: Solve for x
   x = 1,482,533,951.10/21,790.69
6. Step 6: Final answer
   x = 68,035.21