Finding the Fourth Proportional to 11,898.48, 16,418.78 and 7,117.46

Step by Step Solution

1. Step 1: Write the proportion equation
   11,898.48 : 16,418.78 = 7,117.46 : x
2. Step 2: Convert to fraction form
   11,898.48/16,418.78 = 7,117.46/x
3. Step 3: Cross multiply
   11,898.48x = 16,418.78 × 7,117.46
4. Step 4: Simplify right side
   11,898.48x = 116,860,009.90
5. Step 5: Solve for x
   x = 116,860,009.90/11,898.48
6. Step 6: Final answer
   x = 9,821.42