Finding the Fourth Proportional to 9,147.18, 13,721.34 and 3,953

Step by Step Solution

1. Step 1: Write the proportion equation
   9,147.18 : 13,721.34 = 3,953 : x
2. Step 2: Convert to fraction form
   9,147.18/13,721.34 = 3,953/x
3. Step 3: Cross multiply
   9,147.18x = 13,721.34 × 3,953
4. Step 4: Simplify right side
   9,147.18x = 54,240,457.02
5. Step 5: Solve for x
   x = 54,240,457.02/9,147.18
6. Step 6: Final answer
   x = 5,929.75