Finding the Third Proportional to 18,037.69 and 21,156.19

Step by Step Solution

1. Step 1: Write the proportion equation
   18,037.69 : 21,156.19 = 21,156.19 : x
2. Step 2: Convert to fraction form
   18,037.69/21,156.19 = 21,156.19/x
3. Step 3: Cross multiply
   18,037.69x = 21,156.19 × 21,156.19
4. Step 4: Simplify right side
   18,037.69x = 447,584,269.54
5. Step 5: Solve for x
   x = 447,584,269.54/18,037.69
6. Step 6: Final answer
   x = 24,813.84