Finding the Fourth Proportional to 22,578.74, 31,156 and 13,018.52

Step by Step Solution

1. Step 1: Write the proportion equation
   22,578.74 : 31,156 = 13,018.52 : x
2. Step 2: Convert to fraction form
   22,578.74/31,156 = 13,018.52/x
3. Step 3: Cross multiply
   22,578.74x = 31,156 × 13,018.52
4. Step 4: Simplify right side
   22,578.74x = 405,605,009.12
5. Step 5: Solve for x
   x = 405,605,009.12/22,578.74
6. Step 6: Final answer
   x = 17,964.02