Finding the Fourth Proportional to 13,146.71, 19,706.31 and 5,749.20

Step by Step Solution

1. Step 1: Write the proportion equation
   13,146.71 : 19,706.31 = 5,749.20 : x
2. Step 2: Convert to fraction form
   13,146.71/19,706.31 = 5,749.20/x
3. Step 3: Cross multiply
   13,146.71x = 19,706.31 × 5,749.20
4. Step 4: Simplify right side
   13,146.71x = 113,295,517.45
5. Step 5: Solve for x
   x = 113,295,517.45/13,146.71
6. Step 6: Final answer
   x = 8,617.79