Finding the Fourth Proportional to 22,570.80, 31,147.72 and 12,361.78

Step by Step Solution

1. Step 1: Write the proportion equation
   22,570.80 : 31,147.72 = 12,361.78 : x
2. Step 2: Convert to fraction form
   22,570.80/31,147.72 = 12,361.78/x
3. Step 3: Cross multiply
   22,570.80x = 31,147.72 × 12,361.78
4. Step 4: Simplify right side
   22,570.80x = 385,041,262.14
5. Step 5: Solve for x
   x = 385,041,262.14/22,570.80
6. Step 6: Final answer
   x = 17,059.27