Finding the Fourth Proportional to 9,398.56, 12,969.90 and 5,206.72

Step by Step Solution

1. Step 1: Write the proportion equation
   9,398.56 : 12,969.90 = 5,206.72 : x
2. Step 2: Convert to fraction form
   9,398.56/12,969.90 = 5,206.72/x
3. Step 3: Cross multiply
   9,398.56x = 12,969.90 × 5,206.72
4. Step 4: Simplify right side
   9,398.56x = 67,530,637.73
5. Step 5: Solve for x
   x = 67,530,637.73/9,398.56
6. Step 6: Final answer
   x = 7,185.21