Finding the Third Proportional to 21,780.50 and 47,710.75

Step by Step Solution

1. Step 1: Write the proportion equation
   21,780.50 : 47,710.75 = 47,710.75 : x
2. Step 2: Convert to fraction form
   21,780.50/47,710.75 = 47,710.75/x
3. Step 3: Cross multiply
   21,780.50x = 47,710.75 × 47,710.75
4. Step 4: Simplify right side
   21,780.50x = 2,276,315,665.56
5. Step 5: Solve for x
   x = 2,276,315,665.56/21,780.50
6. Step 6: Final answer
   x = 104,511.63