Finding the Fourth Proportional to 12,300.31, 18,453.57 and 3,535.03

Step by Step Solution

1. Step 1: Write the proportion equation
   12,300.31 : 18,453.57 = 3,535.03 : x
2. Step 2: Convert to fraction form
   12,300.31/18,453.57 = 3,535.03/x
3. Step 3: Cross multiply
   12,300.31x = 18,453.57 × 3,535.03
4. Step 4: Simplify right side
   12,300.31x = 65,233,923.56
5. Step 5: Solve for x
   x = 65,233,923.56/12,300.31
6. Step 6: Final answer
   x = 5,303.44