Finding the Fourth Proportional to 13,491.44, 18,618.51 and 7,523.05

Step by Step Solution

1. Step 1: Write the proportion equation
   13,491.44 : 18,618.51 = 7,523.05 : x
2. Step 2: Convert to fraction form
   13,491.44/18,618.51 = 7,523.05/x
3. Step 3: Cross multiply
   13,491.44x = 18,618.51 × 7,523.05
4. Step 4: Simplify right side
   13,491.44x = 140,067,888.56
5. Step 5: Solve for x
   x = 140,067,888.56/13,491.44
6. Step 6: Final answer
   x = 10,381.99