Finding the Third Proportional to 4,788 and 10,155.75

Step by Step Solution

1. Step 1: Write the proportion equation
   4,788 : 10,155.75 = 10,155.75 : x
2. Step 2: Convert to fraction form
   4,788/10,155.75 = 10,155.75/x
3. Step 3: Cross multiply
   4,788x = 10,155.75 × 10,155.75
4. Step 4: Simplify right side
   4,788x = 103,139,258.06
5. Step 5: Solve for x
   x = 103,139,258.06/4,788
6. Step 6: Final answer
   x = 21,541.20