Finding the Fourth Proportional to 12,871.71, 17,765.73 and 7,837.59

Step by Step Solution

1. Step 1: Write the proportion equation
   12,871.71 : 17,765.73 = 7,837.59 : x
2. Step 2: Convert to fraction form
   12,871.71/17,765.73 = 7,837.59/x
3. Step 3: Cross multiply
   12,871.71x = 17,765.73 × 7,837.59
4. Step 4: Simplify right side
   12,871.71x = 139,240,507.79
5. Step 5: Solve for x
   x = 139,240,507.79/12,871.71
6. Step 6: Final answer
   x = 10,817.56