Finding the Fourth Proportional to 16,810.94, 25,215.50 and 5,123.25

Step by Step Solution

1. Step 1: Write the proportion equation
   16,810.94 : 25,215.50 = 5,123.25 : x
2. Step 2: Convert to fraction form
   16,810.94/25,215.50 = 5,123.25/x
3. Step 3: Cross multiply
   16,810.94x = 25,215.50 × 5,123.25
4. Step 4: Simplify right side
   16,810.94x = 129,185,323.18
5. Step 5: Solve for x
   x = 129,185,323.18/16,810.94
6. Step 6: Final answer
   x = 7,684.60