Finding the Fourth Proportional to 11,445.09, 17,091.28 and 8,951.91

Step by Step Solution

1. Step 1: Write the proportion equation
   11,445.09 : 17,091.28 = 8,951.91 : x
2. Step 2: Convert to fraction form
   11,445.09/17,091.28 = 8,951.91/x
3. Step 3: Cross multiply
   11,445.09x = 17,091.28 × 8,951.91
4. Step 4: Simplify right side
   11,445.09x = 152,999,555.59
5. Step 5: Solve for x
   x = 152,999,555.59/11,445.09
6. Step 6: Final answer
   x = 13,368.14