Finding the Fourth Proportional to 12,680.70, 17,499.06 and 7,015.32

Step by Step Solution

1. Step 1: Write the proportion equation
   12,680.70 : 17,499.06 = 7,015.32 : x
2. Step 2: Convert to fraction form
   12,680.70/17,499.06 = 7,015.32/x
3. Step 3: Cross multiply
   12,680.70x = 17,499.06 × 7,015.32
4. Step 4: Simplify right side
   12,680.70x = 122,761,505.60
5. Step 5: Solve for x
   x = 122,761,505.60/12,680.70
6. Step 6: Final answer
   x = 9,680.97