Finding the Fourth Proportional to 11,422.21, 17,131.22 and 5,180.71

Step by Step Solution

1. Step 1: Write the proportion equation
   11,422.21 : 17,131.22 = 5,180.71 : x
2. Step 2: Convert to fraction form
   11,422.21/17,131.22 = 5,180.71/x
3. Step 3: Cross multiply
   11,422.21x = 17,131.22 × 5,180.71
4. Step 4: Simplify right side
   11,422.21x = 88,751,882.77
5. Step 5: Solve for x
   x = 88,751,882.77/11,422.21
6. Step 6: Final answer
   x = 7,770.11