Finding the Fourth Proportional to 13,443.91, 18,551.87 and 7,394.03

Step by Step Solution

1. Step 1: Write the proportion equation
   13,443.91 : 18,551.87 = 7,394.03 : x
2. Step 2: Convert to fraction form
   13,443.91/18,551.87 = 7,394.03/x
3. Step 3: Cross multiply
   13,443.91x = 18,551.87 × 7,394.03
4. Step 4: Simplify right side
   13,443.91x = 137,172,953.61
5. Step 5: Solve for x
   x = 137,172,953.61/13,443.91
6. Step 6: Final answer
   x = 10,203.35