Finding the Fourth Proportional to 10,804.75, 16,209.09 and 5,258.10

Step by Step Solution

1. Step 1: Write the proportion equation
   10,804.75 : 16,209.09 = 5,258.10 : x
2. Step 2: Convert to fraction form
   10,804.75/16,209.09 = 5,258.10/x
3. Step 3: Cross multiply
   10,804.75x = 16,209.09 × 5,258.10
4. Step 4: Simplify right side
   10,804.75x = 85,228,970.95
5. Step 5: Solve for x
   x = 85,228,970.95/10,804.75
6. Step 6: Final answer
   x = 7,888.10