Finding the Fourth Proportional to 10,513.79, 15,768.26 and 3,116.47

Step by Step Solution

1. Step 1: Write the proportion equation
   10,513.79 : 15,768.26 = 3,116.47 : x
2. Step 2: Convert to fraction form
   10,513.79/15,768.26 = 3,116.47/x
3. Step 3: Cross multiply
   10,513.79x = 15,768.26 × 3,116.47
4. Step 4: Simplify right side
   10,513.79x = 49,141,242.38
5. Step 5: Solve for x
   x = 49,141,242.38/10,513.79
6. Step 6: Final answer
   x = 4,673.98