Finding the Fourth Proportional to 11,863.83, 17,757.15 and 8,742.60

Step by Step Solution

1. Step 1: Write the proportion equation
   11,863.83 : 17,757.15 = 8,742.60 : x
2. Step 2: Convert to fraction form
   11,863.83/17,757.15 = 8,742.60/x
3. Step 3: Cross multiply
   11,863.83x = 17,757.15 × 8,742.60
4. Step 4: Simplify right side
   11,863.83x = 155,243,659.59
5. Step 5: Solve for x
   x = 155,243,659.59/11,863.83
6. Step 6: Final answer
   x = 13,085.46