Finding the Fourth Proportional to 12,727.58, 17,570.69 and 9,888.56

Step by Step Solution

1. Step 1: Write the proportion equation
   12,727.58 : 17,570.69 = 9,888.56 : x
2. Step 2: Convert to fraction form
   12,727.58/17,570.69 = 9,888.56/x
3. Step 3: Cross multiply
   12,727.58x = 17,570.69 × 9,888.56
4. Step 4: Simplify right side
   12,727.58x = 173,748,685.01
5. Step 5: Solve for x
   x = 173,748,685.01/12,727.58
6. Step 6: Final answer
   x = 13,651.36