Finding the Fourth Proportional to 22,649.76, 31,253.32 and 12,578.28

Step by Step Solution

1. Step 1: Write the proportion equation
   22,649.76 : 31,253.32 = 12,578.28 : x
2. Step 2: Convert to fraction form
   22,649.76/31,253.32 = 12,578.28/x
3. Step 3: Cross multiply
   22,649.76x = 31,253.32 × 12,578.28
4. Step 4: Simplify right side
   22,649.76x = 393,113,009.89
5. Step 5: Solve for x
   x = 393,113,009.89/22,649.76
6. Step 6: Final answer
   x = 17,356.17