Finding the Fourth Proportional to 10,507.29, 15,760.88 and 3,111.79

Step by Step Solution

1. Step 1: Write the proportion equation
   10,507.29 : 15,760.88 = 3,111.79 : x
2. Step 2: Convert to fraction form
   10,507.29/15,760.88 = 3,111.79/x
3. Step 3: Cross multiply
   10,507.29x = 15,760.88 × 3,111.79
4. Step 4: Simplify right side
   10,507.29x = 49,044,548.78
5. Step 5: Solve for x
   x = 49,044,548.78/10,507.29
6. Step 6: Final answer
   x = 4,667.67