Finding the Fourth Proportional to 2,109.80, 3,155.43 and 1,556.30

Step by Step Solution

1. Step 1: Write the proportion equation
   2,109.80 : 3,155.43 = 1,556.30 : x
2. Step 2: Convert to fraction form
   2,109.80/3,155.43 = 1,556.30/x
3. Step 3: Cross multiply
   2,109.80x = 3,155.43 × 1,556.30
4. Step 4: Simplify right side
   2,109.80x = 4,910,795.71
5. Step 5: Solve for x
   x = 4,910,795.71/2,109.80
6. Step 6: Final answer
   x = 2,327.61