Finding the Fourth Proportional to 10,525.40, 15,789.60 and 3,503.12

Step by Step Solution

1. Step 1: Write the proportion equation
   10,525.40 : 15,789.60 = 3,503.12 : x
2. Step 2: Convert to fraction form
   10,525.40/15,789.60 = 3,503.12/x
3. Step 3: Cross multiply
   10,525.40x = 15,789.60 × 3,503.12
4. Step 4: Simplify right side
   10,525.40x = 55,312,863.55
5. Step 5: Solve for x
   x = 55,312,863.55/10,525.40
6. Step 6: Final answer
   x = 5,255.18