Finding the Fourth Proportional to 9,558.72, 13,191.12 and 5,580

Step by Step Solution

1. Step 1: Write the proportion equation
   9,558.72 : 13,191.12 = 5,580 : x
2. Step 2: Convert to fraction form
   9,558.72/13,191.12 = 5,580/x
3. Step 3: Cross multiply
   9,558.72x = 13,191.12 × 5,580
4. Step 4: Simplify right side
   9,558.72x = 73,606,449.60
5. Step 5: Solve for x
   x = 73,606,449.60/9,558.72
6. Step 6: Final answer
   x = 7,700.45