Finding the Fourth Proportional to 11,897.46, 16,421.88 and 7,182.05

Step by Step Solution

1. Step 1: Write the proportion equation
   11,897.46 : 16,421.88 = 7,182.05 : x
2. Step 2: Convert to fraction form
   11,897.46/16,421.88 = 7,182.05/x
3. Step 3: Cross multiply
   11,897.46x = 16,421.88 × 7,182.05
4. Step 4: Simplify right side
   11,897.46x = 117,942,763.25
5. Step 5: Solve for x
   x = 117,942,763.25/11,897.46
6. Step 6: Final answer
   x = 9,913.27