Finding the Fourth Proportional to 9,606.79, 13,257.98 and 5,415.31

Step by Step Solution

1. Step 1: Write the proportion equation
   9,606.79 : 13,257.98 = 5,415.31 : x
2. Step 2: Convert to fraction form
   9,606.79/13,257.98 = 5,415.31/x
3. Step 3: Cross multiply
   9,606.79x = 13,257.98 × 5,415.31
4. Step 4: Simplify right side
   9,606.79x = 71,796,071.67
5. Step 5: Solve for x
   x = 71,796,071.67/9,606.79
6. Step 6: Final answer
   x = 7,473.47