Finding the Fourth Proportional to 22,429.30, 30,956.91 and 12,875.64

Step by Step Solution

1. Step 1: Write the proportion equation
   22,429.30 : 30,956.91 = 12,875.64 : x
2. Step 2: Convert to fraction form
   22,429.30/30,956.91 = 12,875.64/x
3. Step 3: Cross multiply
   22,429.30x = 30,956.91 × 12,875.64
4. Step 4: Simplify right side
   22,429.30x = 398,590,028.67
5. Step 5: Solve for x
   x = 398,590,028.67/22,429.30
6. Step 6: Final answer
   x = 17,770.95