Finding the Fourth Proportional to 16,899.37, 25,347.42 and 5,209.45

Step by Step Solution

1. Step 1: Write the proportion equation
   16,899.37 : 25,347.42 = 5,209.45 : x
2. Step 2: Convert to fraction form
   16,899.37/25,347.42 = 5,209.45/x
3. Step 3: Cross multiply
   16,899.37x = 25,347.42 × 5,209.45
4. Step 4: Simplify right side
   16,899.37x = 132,046,117.12
5. Step 5: Solve for x
   x = 132,046,117.12/16,899.37
6. Step 6: Final answer
   x = 7,813.67