Finding the Fourth Proportional to 9,150.10, 13,728.76 and 3,886.25

Step by Step Solution

1. Step 1: Write the proportion equation
   9,150.10 : 13,728.76 = 3,886.25 : x
2. Step 2: Convert to fraction form
   9,150.10/13,728.76 = 3,886.25/x
3. Step 3: Cross multiply
   9,150.10x = 13,728.76 × 3,886.25
4. Step 4: Simplify right side
   9,150.10x = 53,353,315.19
5. Step 5: Solve for x
   x = 53,353,315.19/9,150.10
6. Step 6: Final answer
   x = 5,830.90