Finding the Fourth Proportional to 12,820.25, 19,233.62 and 3,936.02

Step by Step Solution

1. Step 1: Write the proportion equation
   12,820.25 : 19,233.62 = 3,936.02 : x
2. Step 2: Convert to fraction form
   12,820.25/19,233.62 = 3,936.02/x
3. Step 3: Cross multiply
   12,820.25x = 19,233.62 × 3,936.02
4. Step 4: Simplify right side
   12,820.25x = 75,703,941.40
5. Step 5: Solve for x
   x = 75,703,941.40/12,820.25
6. Step 6: Final answer
   x = 5,905.03