Finding the Fourth Proportional to 3,870.48, 5,320.72 and 3,330.14

Step by Step Solution

1. Step 1: Write the proportion equation
   3,870.48 : 5,320.72 = 3,330.14 : x
2. Step 2: Convert to fraction form
   3,870.48/5,320.72 = 3,330.14/x
3. Step 3: Cross multiply
   3,870.48x = 5,320.72 × 3,330.14
4. Step 4: Simplify right side
   3,870.48x = 17,718,742.50
5. Step 5: Solve for x
   x = 17,718,742.50/3,870.48
6. Step 6: Final answer
   x = 4,577.92