Finding the Fourth Proportional to 13,443.85, 20,146.69 and 9,906.04

Step by Step Solution

1. Step 1: Write the proportion equation
   13,443.85 : 20,146.69 = 9,906.04 : x
2. Step 2: Convert to fraction form
   13,443.85/20,146.69 = 9,906.04/x
3. Step 3: Cross multiply
   13,443.85x = 20,146.69 × 9,906.04
4. Step 4: Simplify right side
   13,443.85x = 199,573,954.57
5. Step 5: Solve for x
   x = 199,573,954.57/13,443.85
6. Step 6: Final answer
   x = 14,845.00