Finding the Fourth Proportional to 13,401.36, 18,493.56 and 7,432.74

Step by Step Solution

1. Step 1: Write the proportion equation
   13,401.36 : 18,493.56 = 7,432.74 : x
2. Step 2: Convert to fraction form
   13,401.36/18,493.56 = 7,432.74/x
3. Step 3: Cross multiply
   13,401.36x = 18,493.56 × 7,432.74
4. Step 4: Simplify right side
   13,401.36x = 137,457,823.15
5. Step 5: Solve for x
   x = 137,457,823.15/13,401.36
6. Step 6: Final answer
   x = 10,257.01