Finding the Fourth Proportional to 9,435.12, 13,019.55 and 5,657.58

Step by Step Solution

1. Step 1: Write the proportion equation
   9,435.12 : 13,019.55 = 5,657.58 : x
2. Step 2: Convert to fraction form
   9,435.12/13,019.55 = 5,657.58/x
3. Step 3: Cross multiply
   9,435.12x = 13,019.55 × 5,657.58
4. Step 4: Simplify right side
   9,435.12x = 73,659,145.69
5. Step 5: Solve for x
   x = 73,659,145.69/9,435.12
6. Step 6: Final answer
   x = 7,806.91