Finding the Fourth Proportional to 5,337.78, 8,003.61 and 1,639.02

Step by Step Solution

1. Step 1: Write the proportion equation
   5,337.78 : 8,003.61 = 1,639.02 : x
2. Step 2: Convert to fraction form
   5,337.78/8,003.61 = 1,639.02/x
3. Step 3: Cross multiply
   5,337.78x = 8,003.61 × 1,639.02
4. Step 4: Simplify right side
   5,337.78x = 13,118,076.86
5. Step 5: Solve for x
   x = 13,118,076.86/5,337.78
6. Step 6: Final answer
   x = 2,457.59