Finding the Fourth Proportional to 13,370.72, 18,453.61 and 7,706.31

Step by Step Solution

1. Step 1: Write the proportion equation
   13,370.72 : 18,453.61 = 7,706.31 : x
2. Step 2: Convert to fraction form
   13,370.72/18,453.61 = 7,706.31/x
3. Step 3: Cross multiply
   13,370.72x = 18,453.61 × 7,706.31
4. Step 4: Simplify right side
   13,370.72x = 142,209,179.71
5. Step 5: Solve for x
   x = 142,209,179.71/13,370.72
6. Step 6: Final answer
   x = 10,635.87