Finding the Fourth Proportional to 11,801.09, 16,290.59 and 8,438.04

Step by Step Solution

1. Step 1: Write the proportion equation
   11,801.09 : 16,290.59 = 8,438.04 : x
2. Step 2: Convert to fraction form
   11,801.09/16,290.59 = 8,438.04/x
3. Step 3: Cross multiply
   11,801.09x = 16,290.59 × 8,438.04
4. Step 4: Simplify right side
   11,801.09x = 137,460,607.85
5. Step 5: Solve for x
   x = 137,460,607.85/11,801.09
6. Step 6: Final answer
   x = 11,648.13