Finding the Fourth Proportional to 11,433.72, 17,142.38 and 5,190.60

Step by Step Solution

1. Step 1: Write the proportion equation
   11,433.72 : 17,142.38 = 5,190.60 : x
2. Step 2: Convert to fraction form
   11,433.72/17,142.38 = 5,190.60/x
3. Step 3: Cross multiply
   11,433.72x = 17,142.38 × 5,190.60
4. Step 4: Simplify right side
   11,433.72x = 88,979,211.68
5. Step 5: Solve for x
   x = 88,979,211.68/11,433.72
6. Step 6: Final answer
   x = 7,782.18