Finding the Fourth Proportional to 10,810.96, 16,209.88 and 5,258.71

Step by Step Solution

1. Step 1: Write the proportion equation
   10,810.96 : 16,209.88 = 5,258.71 : x
2. Step 2: Convert to fraction form
   10,810.96/16,209.88 = 5,258.71/x
3. Step 3: Cross multiply
   10,810.96x = 16,209.88 × 5,258.71
4. Step 4: Simplify right side
   10,810.96x = 85,243,079.35
5. Step 5: Solve for x
   x = 85,243,079.35/10,810.96
6. Step 6: Final answer
   x = 7,884.88