Finding the Fourth Proportional to 7,327.21, 10,111.56 and 3,970.06

Step by Step Solution

1. Step 1: Write the proportion equation
   7,327.21 : 10,111.56 = 3,970.06 : x
2. Step 2: Convert to fraction form
   7,327.21/10,111.56 = 3,970.06/x
3. Step 3: Cross multiply
   7,327.21x = 10,111.56 × 3,970.06
4. Step 4: Simplify right side
   7,327.21x = 40,143,499.89
5. Step 5: Solve for x
   x = 40,143,499.89/7,327.21
6. Step 6: Final answer
   x = 5,478.69