Finding the Fourth Proportional to 16,807.52, 23,190.77 and 13,280.99

Step by Step Solution

1. Step 1: Write the proportion equation
   16,807.52 : 23,190.77 = 13,280.99 : x
2. Step 2: Convert to fraction form
   16,807.52/23,190.77 = 13,280.99/x
3. Step 3: Cross multiply
   16,807.52x = 23,190.77 × 13,280.99
4. Step 4: Simplify right side
   16,807.52x = 307,996,301.71
5. Step 5: Solve for x
   x = 307,996,301.71/16,807.52
6. Step 6: Final answer
   x = 18,324.91