Finding the Fourth Proportional to 9,123.04, 13,672.17 and 5,172.43

Step by Step Solution

1. Step 1: Write the proportion equation
   9,123.04 : 13,672.17 = 5,172.43 : x
2. Step 2: Convert to fraction form
   9,123.04/13,672.17 = 5,172.43/x
3. Step 3: Cross multiply
   9,123.04x = 13,672.17 × 5,172.43
4. Step 4: Simplify right side
   9,123.04x = 70,718,271.11
5. Step 5: Solve for x
   x = 70,718,271.11/9,123.04
6. Step 6: Final answer
   x = 7,751.62