Finding the Fourth Proportional to 12,945.47, 19,419.32 and 3,585.49

Step by Step Solution

1. Step 1: Write the proportion equation
   12,945.47 : 19,419.32 = 3,585.49 : x
2. Step 2: Convert to fraction form
   12,945.47/19,419.32 = 3,585.49/x
3. Step 3: Cross multiply
   12,945.47x = 19,419.32 × 3,585.49
4. Step 4: Simplify right side
   12,945.47x = 69,627,782.61
5. Step 5: Solve for x
   x = 69,627,782.61/12,945.47
6. Step 6: Final answer
   x = 5,378.54