Finding the Fourth Proportional to 12,300.19, 18,450.39 and 3,535.10

Step by Step Solution

1. Step 1: Write the proportion equation
   12,300.19 : 18,450.39 = 3,535.10 : x
2. Step 2: Convert to fraction form
   12,300.19/18,450.39 = 3,535.10/x
3. Step 3: Cross multiply
   12,300.19x = 18,450.39 × 3,535.10
4. Step 4: Simplify right side
   12,300.19x = 65,223,973.69
5. Step 5: Solve for x
   x = 65,223,973.69/12,300.19
6. Step 6: Final answer
   x = 5,302.68