Finding the Fourth Proportional to 22,943.29, 31,659.87 and 12,870.37

Step by Step Solution

1. Step 1: Write the proportion equation
   22,943.29 : 31,659.87 = 12,870.37 : x
2. Step 2: Convert to fraction form
   22,943.29/31,659.87 = 12,870.37/x
3. Step 3: Cross multiply
   22,943.29x = 31,659.87 × 12,870.37
4. Step 4: Simplify right side
   22,943.29x = 407,474,241.05
5. Step 5: Solve for x
   x = 407,474,241.05/22,943.29
6. Step 6: Final answer
   x = 17,760.06