Finding the Fourth Proportional to 6,561.77, 9,054.42 and 3,729.12

Step by Step Solution

1. Step 1: Write the proportion equation
   6,561.77 : 9,054.42 = 3,729.12 : x
2. Step 2: Convert to fraction form
   6,561.77/9,054.42 = 3,729.12/x
3. Step 3: Cross multiply
   6,561.77x = 9,054.42 × 3,729.12
4. Step 4: Simplify right side
   6,561.77x = 33,765,018.71
5. Step 5: Solve for x
   x = 33,765,018.71/6,561.77
6. Step 6: Final answer
   x = 5,145.72