Finding the Fourth Proportional to 12,708.04, 19,059.18 and 4,387.72

Step by Step Solution

1. Step 1: Write the proportion equation
   12,708.04 : 19,059.18 = 4,387.72 : x
2. Step 2: Convert to fraction form
   12,708.04/19,059.18 = 4,387.72/x
3. Step 3: Cross multiply
   12,708.04x = 19,059.18 × 4,387.72
4. Step 4: Simplify right side
   12,708.04x = 83,626,345.27
5. Step 5: Solve for x
   x = 83,626,345.27/12,708.04
6. Step 6: Final answer
   x = 6,580.59