Finding the Fourth Proportional to 22,245.42, 30,695.72 and 12,812.16

Step by Step Solution

1. Step 1: Write the proportion equation
   22,245.42 : 30,695.72 = 12,812.16 : x
2. Step 2: Convert to fraction form
   22,245.42/30,695.72 = 12,812.16/x
3. Step 3: Cross multiply
   22,245.42x = 30,695.72 × 12,812.16
4. Step 4: Simplify right side
   22,245.42x = 393,278,411.89
5. Step 5: Solve for x
   x = 393,278,411.89/22,245.42
6. Step 6: Final answer
   x = 17,679.07