Finding the Fourth Proportional to 13,417.50, 18,518.34 and 7,827.42

Step by Step Solution

1. Step 1: Write the proportion equation
   13,417.50 : 18,518.34 = 7,827.42 : x
2. Step 2: Convert to fraction form
   13,417.50/18,518.34 = 7,827.42/x
3. Step 3: Cross multiply
   13,417.50x = 18,518.34 × 7,827.42
4. Step 4: Simplify right side
   13,417.50x = 144,950,824.88
5. Step 5: Solve for x
   x = 144,950,824.88/13,417.50
6. Step 6: Final answer
   x = 10,803.12