Finding the Fourth Proportional to 13,993.72, 19,311.06 and 7,706.20

Step by Step Solution

1. Step 1: Write the proportion equation
   13,993.72 : 19,311.06 = 7,706.20 : x
2. Step 2: Convert to fraction form
   13,993.72/19,311.06 = 7,706.20/x
3. Step 3: Cross multiply
   13,993.72x = 19,311.06 × 7,706.20
4. Step 4: Simplify right side
   13,993.72x = 148,814,890.57
5. Step 5: Solve for x
   x = 148,814,890.57/13,993.72
6. Step 6: Final answer
   x = 10,634.41