Finding the Third Proportional to 21,115.69 and 49,987.13

Step by Step Solution

1. Step 1: Write the proportion equation
   21,115.69 : 49,987.13 = 49,987.13 : x
2. Step 2: Convert to fraction form
   21,115.69/49,987.13 = 49,987.13/x
3. Step 3: Cross multiply
   21,115.69x = 49,987.13 × 49,987.13
4. Step 4: Simplify right side
   21,115.69x = 2,498,712,665.77
5. Step 5: Solve for x
   x = 2,498,712,665.77/21,115.69
6. Step 6: Final answer
   x = 118,334.42