Finding the Third Proportional to 11,385.56 and 17,108.72

Step by Step Solution

1. Step 1: Write the proportion equation
   11,385.56 : 17,108.72 = 17,108.72 : x
2. Step 2: Convert to fraction form
   11,385.56/17,108.72 = 17,108.72/x
3. Step 3: Cross multiply
   11,385.56x = 17,108.72 × 17,108.72
4. Step 4: Simplify right side
   11,385.56x = 292,708,257.27
5. Step 5: Solve for x
   x = 292,708,257.27/11,385.56
6. Step 6: Final answer
   x = 25,708.72