Finding the Fourth Proportional to 10,570.78, 15,858.51 and 3,551.05

Step by Step Solution

1. Step 1: Write the proportion equation
   10,570.78 : 15,858.51 = 3,551.05 : x
2. Step 2: Convert to fraction form
   10,570.78/15,858.51 = 3,551.05/x
3. Step 3: Cross multiply
   10,570.78x = 15,858.51 × 3,551.05
4. Step 4: Simplify right side
   10,570.78x = 56,314,361.94
5. Step 5: Solve for x
   x = 56,314,361.94/10,570.78
6. Step 6: Final answer
   x = 5,327.36