Finding the Third Proportional to 11,715 and 25,615.50

Step by Step Solution

1. Step 1: Write the proportion equation
   11,715 : 25,615.50 = 25,615.50 : x
2. Step 2: Convert to fraction form
   11,715/25,615.50 = 25,615.50/x
3. Step 3: Cross multiply
   11,715x = 25,615.50 × 25,615.50
4. Step 4: Simplify right side
   11,715x = 656,153,840.25
5. Step 5: Solve for x
   x = 656,153,840.25/11,715
6. Step 6: Final answer
   x = 56,009.72