Finding the Fourth Proportional to 11,978.69, 17,973.61 and 4,580.71

Step by Step Solution

1. Step 1: Write the proportion equation
   11,978.69 : 17,973.61 = 4,580.71 : x
2. Step 2: Convert to fraction form
   11,978.69/17,973.61 = 4,580.71/x
3. Step 3: Cross multiply
   11,978.69x = 17,973.61 × 4,580.71
4. Step 4: Simplify right side
   11,978.69x = 82,331,838.68
5. Step 5: Solve for x
   x = 82,331,838.68/11,978.69
6. Step 6: Final answer
   x = 6,873.20