Finding the Fourth Proportional to 11,185.86, 16,775.55 and 4,258.74

Step by Step Solution

1. Step 1: Write the proportion equation
   11,185.86 : 16,775.55 = 4,258.74 : x
2. Step 2: Convert to fraction form
   11,185.86/16,775.55 = 4,258.74/x
3. Step 3: Cross multiply
   11,185.86x = 16,775.55 × 4,258.74
4. Step 4: Simplify right side
   11,185.86x = 71,442,705.81
5. Step 5: Solve for x
   x = 71,442,705.81/11,185.86
6. Step 6: Final answer
   x = 6,386.88