Finding the Fourth Proportional to 3,783.59, 5,676.34 and 1,318.45

Step by Step Solution

1. Step 1: Write the proportion equation
   3,783.59 : 5,676.34 = 1,318.45 : x
2. Step 2: Convert to fraction form
   3,783.59/5,676.34 = 1,318.45/x
3. Step 3: Cross multiply
   3,783.59x = 5,676.34 × 1,318.45
4. Step 4: Simplify right side
   3,783.59x = 7,483,970.47
5. Step 5: Solve for x
   x = 7,483,970.47/3,783.59
6. Step 6: Final answer
   x = 1,978.01