Finding the Fourth Proportional to 12,960.55, 19,437.18 and 3,598.30

Step by Step Solution

1. Step 1: Write the proportion equation
   12,960.55 : 19,437.18 = 3,598.30 : x
2. Step 2: Convert to fraction form
   12,960.55/19,437.18 = 3,598.30/x
3. Step 3: Cross multiply
   12,960.55x = 19,437.18 × 3,598.30
4. Step 4: Simplify right side
   12,960.55x = 69,940,804.79
5. Step 5: Solve for x
   x = 69,940,804.79/12,960.55
6. Step 6: Final answer
   x = 5,396.44