Finding the Fourth Proportional to 10,815.25, 16,196.75 and 5,254.87

Step by Step Solution

1. Step 1: Write the proportion equation
   10,815.25 : 16,196.75 = 5,254.87 : x
2. Step 2: Convert to fraction form
   10,815.25/16,196.75 = 5,254.87/x
3. Step 3: Cross multiply
   10,815.25x = 16,196.75 × 5,254.87
4. Step 4: Simplify right side
   10,815.25x = 85,111,815.67
5. Step 5: Solve for x
   x = 85,111,815.67/10,815.25
6. Step 6: Final answer
   x = 7,869.61