Finding the Fourth Proportional to 9,139.34, 13,714.48 and 3,945.22

Step by Step Solution

1. Step 1: Write the proportion equation
   9,139.34 : 13,714.48 = 3,945.22 : x
2. Step 2: Convert to fraction form
   9,139.34/13,714.48 = 3,945.22/x
3. Step 3: Cross multiply
   9,139.34x = 13,714.48 × 3,945.22
4. Step 4: Simplify right side
   9,139.34x = 54,106,640.79
5. Step 5: Solve for x
   x = 54,106,640.79/9,139.34
6. Step 6: Final answer
   x = 5,920.19