Finding the Fourth Proportional to 9,503.16, 14,243.80 and 5,111.39

Step by Step Solution

1. Step 1: Write the proportion equation
   9,503.16 : 14,243.80 = 5,111.39 : x
2. Step 2: Convert to fraction form
   9,503.16/14,243.80 = 5,111.39/x
3. Step 3: Cross multiply
   9,503.16x = 14,243.80 × 5,111.39
4. Step 4: Simplify right side
   9,503.16x = 72,805,616.88
5. Step 5: Solve for x
   x = 72,805,616.88/9,503.16
6. Step 6: Final answer
   x = 7,661.20