Finding the Fourth Proportional to 3,900, 5,850.72 and 1,302.24

Step by Step Solution

1. Step 1: Write the proportion equation
   3,900 : 5,850.72 = 1,302.24 : x
2. Step 2: Convert to fraction form
   3,900/5,850.72 = 1,302.24/x
3. Step 3: Cross multiply
   3,900x = 5,850.72 × 1,302.24
4. Step 4: Simplify right side
   3,900x = 7,619,041.61
5. Step 5: Solve for x
   x = 7,619,041.61/3,900
6. Step 6: Final answer
   x = 1,953.60