Finding the Fourth Proportional to 9,555.12, 13,186.89 and 5,577.51

Step by Step Solution

1. Step 1: Write the proportion equation
   9,555.12 : 13,186.89 = 5,577.51 : x
2. Step 2: Convert to fraction form
   9,555.12/13,186.89 = 5,577.51/x
3. Step 3: Cross multiply
   9,555.12x = 13,186.89 × 5,577.51
4. Step 4: Simplify right side
   9,555.12x = 73,550,010.84
5. Step 5: Solve for x
   x = 73,550,010.84/9,555.12
6. Step 6: Final answer
   x = 7,697.45