Finding the Third Proportional to 11,112 and 17,680.50

Step by Step Solution

1. Step 1: Write the proportion equation
   11,112 : 17,680.50 = 17,680.50 : x
2. Step 2: Convert to fraction form
   11,112/17,680.50 = 17,680.50/x
3. Step 3: Cross multiply
   11,112x = 17,680.50 × 17,680.50
4. Step 4: Simplify right side
   11,112x = 312,600,080.25
5. Step 5: Solve for x
   x = 312,600,080.25/11,112
6. Step 6: Final answer
   x = 28,131.76