Finding the Fourth Proportional to 9,679.30, 13,357.10 and 5,487.55

Step by Step Solution

1. Step 1: Write the proportion equation
   9,679.30 : 13,357.10 = 5,487.55 : x
2. Step 2: Convert to fraction form
   9,679.30/13,357.10 = 5,487.55/x
3. Step 3: Cross multiply
   9,679.30x = 13,357.10 × 5,487.55
4. Step 4: Simplify right side
   9,679.30x = 73,297,734.43
5. Step 5: Solve for x
   x = 73,297,734.43/9,679.30
6. Step 6: Final answer
   x = 7,572.63