Finding the Fourth Proportional to 10,629.61, 15,941.98 and 3,131.23

Step by Step Solution

1. Step 1: Write the proportion equation
   10,629.61 : 15,941.98 = 3,131.23 : x
2. Step 2: Convert to fraction form
   10,629.61/15,941.98 = 3,131.23/x
3. Step 3: Cross multiply
   10,629.61x = 15,941.98 × 3,131.23
4. Step 4: Simplify right side
   10,629.61x = 49,918,006.04
5. Step 5: Solve for x
   x = 49,918,006.04/10,629.61
6. Step 6: Final answer
   x = 4,696.13