Finding the Fourth Proportional to 23,990.80, 33,108.72 and 13,380.16

Step by Step Solution

1. Step 1: Write the proportion equation
   23,990.80 : 33,108.72 = 13,380.16 : x
2. Step 2: Convert to fraction form
   23,990.80/33,108.72 = 13,380.16/x
3. Step 3: Cross multiply
   23,990.80x = 33,108.72 × 13,380.16
4. Step 4: Simplify right side
   23,990.80x = 442,999,971.00
5. Step 5: Solve for x
   x = 442,999,971.00/23,990.80
6. Step 6: Final answer
   x = 18,465.41