Finding the Fourth Proportional to 8,886.16, 12,258.84 and 5,158

Step by Step Solution

1. Step 1: Write the proportion equation
   8,886.16 : 12,258.84 = 5,158 : x
2. Step 2: Convert to fraction form
   8,886.16/12,258.84 = 5,158/x
3. Step 3: Cross multiply
   8,886.16x = 12,258.84 × 5,158
4. Step 4: Simplify right side
   8,886.16x = 63,231,096.72
5. Step 5: Solve for x
   x = 63,231,096.72/8,886.16
6. Step 6: Final answer
   x = 7,115.68