Finding the Fourth Proportional to 11,427.46, 17,139.90 and 5,422.12

Step by Step Solution

1. Step 1: Write the proportion equation
   11,427.46 : 17,139.90 = 5,422.12 : x
2. Step 2: Convert to fraction form
   11,427.46/17,139.90 = 5,422.12/x
3. Step 3: Cross multiply
   11,427.46x = 17,139.90 × 5,422.12
4. Step 4: Simplify right side
   11,427.46x = 92,934,594.59
5. Step 5: Solve for x
   x = 92,934,594.59/11,427.46
6. Step 6: Final answer
   x = 8,132.57