Finding the Fourth Proportional to 16,811.69, 25,216.63 and 5,124

Step by Step Solution

1. Step 1: Write the proportion equation
   16,811.69 : 25,216.63 = 5,124 : x
2. Step 2: Convert to fraction form
   16,811.69/25,216.63 = 5,124/x
3. Step 3: Cross multiply
   16,811.69x = 25,216.63 × 5,124
4. Step 4: Simplify right side
   16,811.69x = 129,209,999.31
5. Step 5: Solve for x
   x = 129,209,999.31/16,811.69
6. Step 6: Final answer
   x = 7,685.72