Finding the Fourth Proportional to 12,681.31, 17,499.48 and 7,015.73

Step by Step Solution

1. Step 1: Write the proportion equation
   12,681.31 : 17,499.48 = 7,015.73 : x
2. Step 2: Convert to fraction form
   12,681.31/17,499.48 = 7,015.73/x
3. Step 3: Cross multiply
   12,681.31x = 17,499.48 × 7,015.73
4. Step 4: Simplify right side
   12,681.31x = 122,771,650.91
5. Step 5: Solve for x
   x = 122,771,650.91/12,681.31
6. Step 6: Final answer
   x = 9,681.31