Finding the Fourth Proportional to 12,718.49, 19,071.59 and 4,395.59

Step by Step Solution

1. Step 1: Write the proportion equation
   12,718.49 : 19,071.59 = 4,395.59 : x
2. Step 2: Convert to fraction form
   12,718.49/19,071.59 = 4,395.59/x
3. Step 3: Cross multiply
   12,718.49x = 19,071.59 × 4,395.59
4. Step 4: Simplify right side
   12,718.49x = 83,830,948.96
5. Step 5: Solve for x
   x = 83,830,948.96/12,718.49
6. Step 6: Final answer
   x = 6,591.26