Finding the Fourth Proportional to 3,155.91, 4,355.15 and 1,830.38

Step by Step Solution

1. Step 1: Write the proportion equation
   3,155.91 : 4,355.15 = 1,830.38 : x
2. Step 2: Convert to fraction form
   3,155.91/4,355.15 = 1,830.38/x
3. Step 3: Cross multiply
   3,155.91x = 4,355.15 × 1,830.38
4. Step 4: Simplify right side
   3,155.91x = 7,971,579.46
5. Step 5: Solve for x
   x = 7,971,579.46/3,155.91
6. Step 6: Final answer
   x = 2,525.92