Finding the Fourth Proportional to 13,619.50, 18,795.72 and 10,256.38

Step by Step Solution

1. Step 1: Write the proportion equation
   13,619.50 : 18,795.72 = 10,256.38 : x
2. Step 2: Convert to fraction form
   13,619.50/18,795.72 = 10,256.38/x
3. Step 3: Cross multiply
   13,619.50x = 18,795.72 × 10,256.38
4. Step 4: Simplify right side
   13,619.50x = 192,776,068.04
5. Step 5: Solve for x
   x = 192,776,068.04/13,619.50
6. Step 6: Final answer
   x = 14,154.41