Finding the Third Proportional to 21,178.50 and 49,239.75

Step by Step Solution

1. Step 1: Write the proportion equation
   21,178.50 : 49,239.75 = 49,239.75 : x
2. Step 2: Convert to fraction form
   21,178.50/49,239.75 = 49,239.75/x
3. Step 3: Cross multiply
   21,178.50x = 49,239.75 × 49,239.75
4. Step 4: Simplify right side
   21,178.50x = 2,424,552,980.06
5. Step 5: Solve for x
   x = 2,424,552,980.06/21,178.50
6. Step 6: Final answer
   x = 114,481.81