Finding the Fourth Proportional to 7,147.85, 10,721.59 and 1,953.72

Step by Step Solution

1. Step 1: Write the proportion equation
   7,147.85 : 10,721.59 = 1,953.72 : x
2. Step 2: Convert to fraction form
   7,147.85/10,721.59 = 1,953.72/x
3. Step 3: Cross multiply
   7,147.85x = 10,721.59 × 1,953.72
4. Step 4: Simplify right side
   7,147.85x = 20,946,979.93
5. Step 5: Solve for x
   x = 20,946,979.93/7,147.85
6. Step 6: Final answer
   x = 2,930.53