Finding the Fourth Proportional to 13,498.05, 18,619.29 and 10,509.15

Step by Step Solution

1. Step 1: Write the proportion equation
   13,498.05 : 18,619.29 = 10,509.15 : x
2. Step 2: Convert to fraction form
   13,498.05/18,619.29 = 10,509.15/x
3. Step 3: Cross multiply
   13,498.05x = 18,619.29 × 10,509.15
4. Step 4: Simplify right side
   13,498.05x = 195,672,911.50
5. Step 5: Solve for x
   x = 195,672,911.50/13,498.05
6. Step 6: Final answer
   x = 14,496.38