Finding the Fourth Proportional to 12,680.64, 17,499.27 and 7,091.64

Step by Step Solution

1. Step 1: Write the proportion equation
   12,680.64 : 17,499.27 = 7,091.64 : x
2. Step 2: Convert to fraction form
   12,680.64/17,499.27 = 7,091.64/x
3. Step 3: Cross multiply
   12,680.64x = 17,499.27 × 7,091.64
4. Step 4: Simplify right side
   12,680.64x = 124,098,523.10
5. Step 5: Solve for x
   x = 124,098,523.10/12,680.64
6. Step 6: Final answer
   x = 9,786.46