Finding the Fourth Proportional to 12,871.45, 17,762.79 and 7,835.88

Step by Step Solution

1. Step 1: Write the proportion equation
   12,871.45 : 17,762.79 = 7,835.88 : x
2. Step 2: Convert to fraction form
   12,871.45/17,762.79 = 7,835.88/x
3. Step 3: Cross multiply
   12,871.45x = 17,762.79 × 7,835.88
4. Step 4: Simplify right side
   12,871.45x = 139,187,090.91
5. Step 5: Solve for x
   x = 139,187,090.91/12,871.45
6. Step 6: Final answer
   x = 10,813.63