Finding the Fourth Proportional to 3,429.86, 5,137.83 and 2,553.30

Step by Step Solution

1. Step 1: Write the proportion equation
   3,429.86 : 5,137.83 = 2,553.30 : x
2. Step 2: Convert to fraction form
   3,429.86/5,137.83 = 2,553.30/x
3. Step 3: Cross multiply
   3,429.86x = 5,137.83 × 2,553.30
4. Step 4: Simplify right side
   3,429.86x = 13,118,421.34
5. Step 5: Solve for x
   x = 13,118,421.34/3,429.86
6. Step 6: Final answer
   x = 3,824.77