Finding the Fourth Proportional to 13,401.59, 18,498.47 and 7,813.67

Step by Step Solution

1. Step 1: Write the proportion equation
   13,401.59 : 18,498.47 = 7,813.67 : x
2. Step 2: Convert to fraction form
   13,401.59/18,498.47 = 7,813.67/x
3. Step 3: Cross multiply
   13,401.59x = 18,498.47 × 7,813.67
4. Step 4: Simplify right side
   13,401.59x = 144,540,808.52
5. Step 5: Solve for x
   x = 144,540,808.52/13,401.59
6. Step 6: Final answer
   x = 10,785.35