Finding the Fourth Proportional to 2,425.86, 3,639.60 and 1,109.34

Step by Step Solution

1. Step 1: Write the proportion equation
   2,425.86 : 3,639.60 = 1,109.34 : x
2. Step 2: Convert to fraction form
   2,425.86/3,639.60 = 1,109.34/x
3. Step 3: Cross multiply
   2,425.86x = 3,639.60 × 1,109.34
4. Step 4: Simplify right side
   2,425.86x = 4,037,553.86
5. Step 5: Solve for x
   x = 4,037,553.86/2,425.86
6. Step 6: Final answer
   x = 1,664.38