Finding the Fourth Proportional to 13,619.50, 18,795.16 and 7,570.31

Step by Step Solution

1. Step 1: Write the proportion equation
   13,619.50 : 18,795.16 = 7,570.31 : x
2. Step 2: Convert to fraction form
   13,619.50/18,795.16 = 7,570.31/x
3. Step 3: Cross multiply
   13,619.50x = 18,795.16 × 7,570.31
4. Step 4: Simplify right side
   13,619.50x = 142,285,093.72
5. Step 5: Solve for x
   x = 142,285,093.72/13,619.50
6. Step 6: Final answer
   x = 10,447.16