Finding the Fourth Proportional to 11,981.69, 17,978.11 and 4,583.71

Step by Step Solution

1. Step 1: Write the proportion equation
   11,981.69 : 17,978.11 = 4,583.71 : x
2. Step 2: Convert to fraction form
   11,981.69/17,978.11 = 4,583.71/x
3. Step 3: Cross multiply
   11,981.69x = 17,978.11 × 4,583.71
4. Step 4: Simplify right side
   11,981.69x = 82,406,442.59
5. Step 5: Solve for x
   x = 82,406,442.59/11,981.69
6. Step 6: Final answer
   x = 6,877.70