Finding the Fourth Proportional to 10,571.48, 15,858.42 and 3,551.99

Step by Step Solution

1. Step 1: Write the proportion equation
   10,571.48 : 15,858.42 = 3,551.99 : x
2. Step 2: Convert to fraction form
   10,571.48/15,858.42 = 3,551.99/x
3. Step 3: Cross multiply
   10,571.48x = 15,858.42 × 3,551.99
4. Step 4: Simplify right side
   10,571.48x = 56,328,856.64
5. Step 5: Solve for x
   x = 56,328,856.64/10,571.48
6. Step 6: Final answer
   x = 5,328.38