Finding the Fourth Proportional to 6,936.51, 10,404.78 and 3,428.17

Step by Step Solution

1. Step 1: Write the proportion equation
   6,936.51 : 10,404.78 = 3,428.17 : x
2. Step 2: Convert to fraction form
   6,936.51/10,404.78 = 3,428.17/x
3. Step 3: Cross multiply
   6,936.51x = 10,404.78 × 3,428.17
4. Step 4: Simplify right side
   6,936.51x = 35,669,383.95
5. Step 5: Solve for x
   x = 35,669,383.95/6,936.51
6. Step 6: Final answer
   x = 5,142.27