Finding the Fourth Proportional to 22,429.06, 30,952.81 and 12,870.70

Step by Step Solution

1. Step 1: Write the proportion equation
   22,429.06 : 30,952.81 = 12,870.70 : x
2. Step 2: Convert to fraction form
   22,429.06/30,952.81 = 12,870.70/x
3. Step 3: Cross multiply
   22,429.06x = 30,952.81 × 12,870.70
4. Step 4: Simplify right side
   22,429.06x = 398,384,364.76
5. Step 5: Solve for x
   x = 398,384,364.76/22,429.06
6. Step 6: Final answer
   x = 17,761.97