Finding the Fourth Proportional to 9,129.30, 12,597.57 and 5,591.94

Step by Step Solution

1. Step 1: Write the proportion equation
   9,129.30 : 12,597.57 = 5,591.94 : x
2. Step 2: Convert to fraction form
   9,129.30/12,597.57 = 5,591.94/x
3. Step 3: Cross multiply
   9,129.30x = 12,597.57 × 5,591.94
4. Step 4: Simplify right side
   9,129.30x = 70,444,855.59
5. Step 5: Solve for x
   x = 70,444,855.59/9,129.30
6. Step 6: Final answer
   x = 7,716.35