Finding the Fourth Proportional to 3,783.60, 5,222.34 and 3,389.94

Step by Step Solution

1. Step 1: Write the proportion equation
   3,783.60 : 5,222.34 = 3,389.94 : x
2. Step 2: Convert to fraction form
   3,783.60/5,222.34 = 3,389.94/x
3. Step 3: Cross multiply
   3,783.60x = 5,222.34 × 3,389.94
4. Step 4: Simplify right side
   3,783.60x = 17,703,419.26
5. Step 5: Solve for x
   x = 17,703,419.26/3,783.60
6. Step 6: Final answer
   x = 4,678.99