Finding the Fourth Proportional to 11,897.28, 17,857.98 and 5,978.34

Step by Step Solution

1. Step 1: Write the proportion equation
   11,897.28 : 17,857.98 = 5,978.34 : x
2. Step 2: Convert to fraction form
   11,897.28/17,857.98 = 5,978.34/x
3. Step 3: Cross multiply
   11,897.28x = 17,857.98 × 5,978.34
4. Step 4: Simplify right side
   11,897.28x = 106,761,076.15
5. Step 5: Solve for x
   x = 106,761,076.15/11,897.28
6. Step 6: Final answer
   x = 8,973.57