Finding the Fourth Proportional to 9,519.96, 13,137.30 and 5,541.78

Step by Step Solution

1. Step 1: Write the proportion equation
   9,519.96 : 13,137.30 = 5,541.78 : x
2. Step 2: Convert to fraction form
   9,519.96/13,137.30 = 5,541.78/x
3. Step 3: Cross multiply
   9,519.96x = 13,137.30 × 5,541.78
4. Step 4: Simplify right side
   9,519.96x = 72,804,026.39
5. Step 5: Solve for x
   x = 72,804,026.39/9,519.96
6. Step 6: Final answer
   x = 7,647.51