Finding the Third Proportional to 25,700 and 55,815

Step by Step Solution

1. Step 1: Write the proportion equation
   25,700 : 55,815 = 55,815 : x
2. Step 2: Convert to fraction form
   25,700/55,815 = 55,815/x
3. Step 3: Cross multiply
   25,700x = 55,815 × 55,815
4. Step 4: Simplify right side
   25,700x = 3,115,314,225
5. Step 5: Solve for x
   x = 3,115,314,225/25,700
6. Step 6: Final answer
   x = 121,218.45