Finding the Fourth Proportional to 12,300.57, 18,450.38 and 3,535.45

Step by Step Solution

1. Step 1: Write the proportion equation
   12,300.57 : 18,450.38 = 3,535.45 : x
2. Step 2: Convert to fraction form
   12,300.57/18,450.38 = 3,535.45/x
3. Step 3: Cross multiply
   12,300.57x = 18,450.38 × 3,535.45
4. Step 4: Simplify right side
   12,300.57x = 65,230,378.29
5. Step 5: Solve for x
   x = 65,230,378.29/12,300.57
6. Step 6: Final answer
   x = 5,303.04