Finding the Fourth Proportional to 22,943.79, 31,660.56 and 12,870.87

Step by Step Solution

1. Step 1: Write the proportion equation
   22,943.79 : 31,660.56 = 12,870.87 : x
2. Step 2: Convert to fraction form
   22,943.79/31,660.56 = 12,870.87/x
3. Step 3: Cross multiply
   22,943.79x = 31,660.56 × 12,870.87
4. Step 4: Simplify right side
   22,943.79x = 407,498,951.89
5. Step 5: Solve for x
   x = 407,498,951.89/22,943.79
6. Step 6: Final answer
   x = 17,760.75