Finding the Fourth Proportional to 9,090.56, 12,545.18 and 5,555.72

Step by Step Solution

1. Step 1: Write the proportion equation
   9,090.56 : 12,545.18 = 5,555.72 : x
2. Step 2: Convert to fraction form
   9,090.56/12,545.18 = 5,555.72/x
3. Step 3: Cross multiply
   9,090.56x = 12,545.18 × 5,555.72
4. Step 4: Simplify right side
   9,090.56x = 69,697,531.85
5. Step 5: Solve for x
   x = 69,697,531.85/9,090.56
6. Step 6: Final answer
   x = 7,667.02