Finding the Fourth Proportional to 8,613.56, 11,886.71 and 5,031

Step by Step Solution

1. Step 1: Write the proportion equation
   8,613.56 : 11,886.71 = 5,031 : x
2. Step 2: Convert to fraction form
   8,613.56/11,886.71 = 5,031/x
3. Step 3: Cross multiply
   8,613.56x = 11,886.71 × 5,031
4. Step 4: Simplify right side
   8,613.56x = 59,802,038.01
5. Step 5: Solve for x
   x = 59,802,038.01/8,613.56
6. Step 6: Final answer
   x = 6,942.78