Finding the Fourth Proportional to 22,570.74, 31,150.17 and 13,145.22

Step by Step Solution

1. Step 1: Write the proportion equation
   22,570.74 : 31,150.17 = 13,145.22 : x
2. Step 2: Convert to fraction form
   22,570.74/31,150.17 = 13,145.22/x
3. Step 3: Cross multiply
   22,570.74x = 31,150.17 × 13,145.22
4. Step 4: Simplify right side
   22,570.74x = 409,475,837.69
5. Step 5: Solve for x
   x = 409,475,837.69/22,570.74
6. Step 6: Final answer
   x = 18,141.89