Finding the Fourth Proportional to 7,064.78, 9,749.51 and 3,878.37

Step by Step Solution

1. Step 1: Write the proportion equation
   7,064.78 : 9,749.51 = 3,878.37 : x
2. Step 2: Convert to fraction form
   7,064.78/9,749.51 = 3,878.37/x
3. Step 3: Cross multiply
   7,064.78x = 9,749.51 × 3,878.37
4. Step 4: Simplify right side
   7,064.78x = 37,812,187.71
5. Step 5: Solve for x
   x = 37,812,187.71/7,064.78
6. Step 6: Final answer
   x = 5,352.21