Finding the Fourth Proportional to 11,978.71, 16,494.93 and 11,713.18

Step by Step Solution

1. Step 1: Write the proportion equation
   11,978.71 : 16,494.93 = 11,713.18 : x
2. Step 2: Convert to fraction form
   11,978.71/16,494.93 = 11,713.18/x
3. Step 3: Cross multiply
   11,978.71x = 16,494.93 × 11,713.18
4. Step 4: Simplify right side
   11,978.71x = 193,208,084.18
5. Step 5: Solve for x
   x = 193,208,084.18/11,978.71
6. Step 6: Final answer
   x = 16,129.29