Finding the Fourth Proportional to 9,555.03, 13,185.87 and 5,521.77

Step by Step Solution

1. Step 1: Write the proportion equation
   9,555.03 : 13,185.87 = 5,521.77 : x
2. Step 2: Convert to fraction form
   9,555.03/13,185.87 = 5,521.77/x
3. Step 3: Cross multiply
   9,555.03x = 13,185.87 × 5,521.77
4. Step 4: Simplify right side
   9,555.03x = 72,809,341.39
5. Step 5: Solve for x
   x = 72,809,341.39/9,555.03
6. Step 6: Final answer
   x = 7,620.00