Finding the Fourth Proportional to 12,681.55, 17,499.54 and 7,015.33

Step by Step Solution

1. Step 1: Write the proportion equation
   12,681.55 : 17,499.54 = 7,015.33 : x
2. Step 2: Convert to fraction form
   12,681.55/17,499.54 = 7,015.33/x
3. Step 3: Cross multiply
   12,681.55x = 17,499.54 × 7,015.33
4. Step 4: Simplify right side
   12,681.55x = 122,765,047.95
5. Step 5: Solve for x
   x = 122,765,047.95/12,681.55
6. Step 6: Final answer
   x = 9,680.60