Finding the Fourth Proportional to 13,443.65, 18,551.42 and 7,475.10

Step by Step Solution

1. Step 1: Write the proportion equation
   13,443.65 : 18,551.42 = 7,475.10 : x
2. Step 2: Convert to fraction form
   13,443.65/18,551.42 = 7,475.10/x
3. Step 3: Cross multiply
   13,443.65x = 18,551.42 × 7,475.10
4. Step 4: Simplify right side
   13,443.65x = 138,673,682.27
5. Step 5: Solve for x
   x = 138,673,682.27/13,443.65
6. Step 6: Final answer
   x = 10,315.18