Finding the Fourth Proportional to 9,747.78, 13,451.58 and 5,555.22

Step by Step Solution

1. Step 1: Write the proportion equation
   9,747.78 : 13,451.58 = 5,555.22 : x
2. Step 2: Convert to fraction form
   9,747.78/13,451.58 = 5,555.22/x
3. Step 3: Cross multiply
   9,747.78x = 13,451.58 × 5,555.22
4. Step 4: Simplify right side
   9,747.78x = 74,726,486.25
5. Step 5: Solve for x
   x = 74,726,486.25/9,747.78
6. Step 6: Final answer
   x = 7,666.00