Finding the Fourth Proportional to 12,681.16, 17,499.14 and 7,015.72

Step by Step Solution

1. Step 1: Write the proportion equation
   12,681.16 : 17,499.14 = 7,015.72 : x
2. Step 2: Convert to fraction form
   12,681.16/17,499.14 = 7,015.72/x
3. Step 3: Cross multiply
   12,681.16x = 17,499.14 × 7,015.72
4. Step 4: Simplify right side
   12,681.16x = 122,769,066.48
5. Step 5: Solve for x
   x = 122,769,066.48/12,681.16
6. Step 6: Final answer
   x = 9,681.22