Finding the Fourth Proportional to 12,866.58, 17,754.62 and 7,489.72

Step by Step Solution

1. Step 1: Write the proportion equation
   12,866.58 : 17,754.62 = 7,489.72 : x
2. Step 2: Convert to fraction form
   12,866.58/17,754.62 = 7,489.72/x
3. Step 3: Cross multiply
   12,866.58x = 17,754.62 × 7,489.72
4. Step 4: Simplify right side
   12,866.58x = 132,977,132.51
5. Step 5: Solve for x
   x = 132,977,132.51/12,866.58
6. Step 6: Final answer
   x = 10,335.08