Finding the Fourth Proportional to 22,918.76, 31,620.42 and 13,356.46

Step by Step Solution

1. Step 1: Write the proportion equation
   22,918.76 : 31,620.42 = 13,356.46 : x
2. Step 2: Convert to fraction form
   22,918.76/31,620.42 = 13,356.46/x
3. Step 3: Cross multiply
   22,918.76x = 31,620.42 × 13,356.46
4. Step 4: Simplify right side
   22,918.76x = 422,336,900.59
5. Step 5: Solve for x
   x = 422,336,900.59/22,918.76
6. Step 6: Final answer
   x = 18,427.56