Finding the Third Proportional to 7,680.13 and 10,785.50

Step by Step Solution

1. Step 1: Write the proportion equation
   7,680.13 : 10,785.50 = 10,785.50 : x
2. Step 2: Convert to fraction form
   7,680.13/10,785.50 = 10,785.50/x
3. Step 3: Cross multiply
   7,680.13x = 10,785.50 × 10,785.50
4. Step 4: Simplify right side
   7,680.13x = 116,326,968.12
5. Step 5: Solve for x
   x = 116,326,968.12/7,680.13
6. Step 6: Final answer
   x = 15,146.49