Finding the Fourth Proportional to 10,121.23, 15,172.59 and 3,543.82

Step by Step Solution

1. Step 1: Write the proportion equation
   10,121.23 : 15,172.59 = 3,543.82 : x
2. Step 2: Convert to fraction form
   10,121.23/15,172.59 = 3,543.82/x
3. Step 3: Cross multiply
   10,121.23x = 15,172.59 × 3,543.82
4. Step 4: Simplify right side
   10,121.23x = 53,768,927.89
5. Step 5: Solve for x
   x = 53,768,927.89/10,121.23
6. Step 6: Final answer
   x = 5,312.49