Finding the Fourth Proportional to 11,636.47, 17,423.72 and 7,945.91

Step by Step Solution

1. Step 1: Write the proportion equation
   11,636.47 : 17,423.72 = 7,945.91 : x
2. Step 2: Convert to fraction form
   11,636.47/17,423.72 = 7,945.91/x
3. Step 3: Cross multiply
   11,636.47x = 17,423.72 × 7,945.91
4. Step 4: Simplify right side
   11,636.47x = 138,447,323.97
5. Step 5: Solve for x
   x = 138,447,323.97/11,636.47
6. Step 6: Final answer
   x = 11,897.71