Finding the Fourth Proportional to 10,145.82, 15,218.20 and 3,572.05

Step by Step Solution

1. Step 1: Write the proportion equation
   10,145.82 : 15,218.20 = 3,572.05 : x
2. Step 2: Convert to fraction form
   10,145.82/15,218.20 = 3,572.05/x
3. Step 3: Cross multiply
   10,145.82x = 15,218.20 × 3,572.05
4. Step 4: Simplify right side
   10,145.82x = 54,360,171.31
5. Step 5: Solve for x
   x = 54,360,171.31/10,145.82
6. Step 6: Final answer
   x = 5,357.89