Finding the Fourth Proportional to 22,384.20, 30,887.78 and 12,951

Step by Step Solution

1. Step 1: Write the proportion equation
   22,384.20 : 30,887.78 = 12,951 : x
2. Step 2: Convert to fraction form
   22,384.20/30,887.78 = 12,951/x
3. Step 3: Cross multiply
   22,384.20x = 30,887.78 × 12,951
4. Step 4: Simplify right side
   22,384.20x = 400,027,574.03
5. Step 5: Solve for x
   x = 400,027,574.03/22,384.20
6. Step 6: Final answer
   x = 17,870.98