Finding the Fourth Proportional to 12,867.81, 17,758.50 and 9,480.35

Step by Step Solution

1. Step 1: Write the proportion equation
   12,867.81 : 17,758.50 = 9,480.35 : x
2. Step 2: Convert to fraction form
   12,867.81/17,758.50 = 9,480.35/x
3. Step 3: Cross multiply
   12,867.81x = 17,758.50 × 9,480.35
4. Step 4: Simplify right side
   12,867.81x = 168,356,828.02
5. Step 5: Solve for x
   x = 168,356,828.02/12,867.81
6. Step 6: Final answer
   x = 13,083.56