Finding the Fourth Proportional to 11,385.16, 17,058.60 and 8,081.88

Step by Step Solution

1. Step 1: Write the proportion equation
   11,385.16 : 17,058.60 = 8,081.88 : x
2. Step 2: Convert to fraction form
   11,385.16/17,058.60 = 8,081.88/x
3. Step 3: Cross multiply
   11,385.16x = 17,058.60 × 8,081.88
4. Step 4: Simplify right side
   11,385.16x = 137,865,494.20
5. Step 5: Solve for x
   x = 137,865,494.20/11,385.16
6. Step 6: Final answer
   x = 12,109.23