Finding the Fourth Proportional to 13,443.18, 18,551.22 and 7,474.74

Step by Step Solution

1. Step 1: Write the proportion equation
   13,443.18 : 18,551.22 = 7,474.74 : x
2. Step 2: Convert to fraction form
   13,443.18/18,551.22 = 7,474.74/x
3. Step 3: Cross multiply
   13,443.18x = 18,551.22 × 7,474.74
4. Step 4: Simplify right side
   13,443.18x = 138,665,546.18
5. Step 5: Solve for x
   x = 138,665,546.18/13,443.18
6. Step 6: Final answer
   x = 10,314.94